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feat(credentials): add context.credentials WebAuthn virtual authenticator - #40849

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Pavel Feldman (pavelfeldman) merged 1 commit into
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pavelfeldman:feat-webauthn
May 16, 2026
Merged

feat(credentials): add context.credentials WebAuthn virtual authenticator#40849
Pavel Feldman (pavelfeldman) merged 1 commit into
microsoft:mainfrom
pavelfeldman:feat-webauthn

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@pavelfeldmanPavel Feldman (pavelfeldman) commented May 14, 2026

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Summary

  • Adds BrowserContext.credentials — a flat, web-API-shaped namespace for seeding WebAuthn credentials and intercepting navigator.credentials.create/get ceremonies.
  • Implemented in userland via an injected script (server-side registry + ECDSA P-256 / CBOR / COSE; page-side override calls back through a binding). Works on Chromium, Firefox and WebKit with no per-browser code.
awaitcontext.credentials.create({rpId: 'example.com'});awaitcontext.credentials.get({ rpId });awaitcontext.credentials.delete(id);awaitcontext.credentials.setUserVerified(false);

Fixes#7276

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Yury Semikhatsky (yury-s) approved these changes May 14, 2026
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Comment threaddocs/src/api/class-credentials.md Outdated
- `id` <[string]> Base64url-encoded credential id.
- `rpId` <[string]> Relying party id.
- `userHandle` <[string]> Base64url-encoded user handle.
- `privateKey` <[string]> PKCS#8 PEM-encoded private key.

@yury-sYury Semikhatsky (yury-s)May 14, 2026

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should also support path

Comment threaddocs/src/api/class-credentials.md
* since: v1.61
- returns: <[Object]>
* alias: VirtualCredential
- `id` <[string]> Base64url-encoded credential id.

@yury-sYury Semikhatsky (yury-s)May 14, 2026

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should playwright encode it itself?

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@pavelfeldman
feat(credentials): add context.credentials WebAuthn virtual authentic…
8c5fe9e
…ator
Adds a flat namespace on BrowserContext that intercepts the page's
navigator.credentials.create() / .get() calls and answers them with an
ES256 keypair Playwright owns. Implemented in userland via an injected
script + a binding, so it works on Chromium, Firefox and WebKit with no
per-browser code.
const context = await browser.newContext({ credentials: true });
await context.credentials.create({ rpId: 'example.com' });
// page's navigator.credentials.get() now succeeds silently.
Verbs mirror navigator.credentials; no authenticator entity. Server-side
registry handles keypair generation, CBOR/COSE encoding of attestation
objects, and ECDSA signing of assertions. Pass id/userHandle/privateKey/
publicKey together to import a pre-registered credential.
Fixes: microsoft#7276
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Test results for "MCP"

7099 passed, 1104 skipped

Merge workflow run.

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Test results for "tests 1"

4 flaky⚠️ [chromium-library] › library/beforeunload.spec.ts:130 › should support dismissing the dialog multiple times `@chromium-ubuntu-22.04-arm-node20`
⚠️ [chromium-library] › library/video.spec.ts:682 › screencast › should capture full viewport on hidpi `@chromium-ubuntu-22.04-arm-node20`
⚠️ [firefox-page] › page/page-add-locator-handler.spec.ts:263 › should wait for hidden by default `@firefox-ubuntu-22.04-node20`
⚠️ [firefox-page] › page/page-emulate-media.spec.ts:144 › should keep reduced motion and color emulation after reload `@firefox-ubuntu-22.04-node20`

41952 passed, 850 skipped

Merge workflow run.

@pavelfeldman
Pavel Feldman (pavelfeldman) merged commit 72bbd1d into microsoft:mainMay 16, 2026
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@yury-sYury Semikhatsky (yury-s) mentioned this pull request Jun 12, 2026
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[Feature] support WebAuthn

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, 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all 
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(function() {
function addCopyButtons() {
document.querySelectorAll('pre code').forEach(function(codeBlock) {
if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;
codeBlock.parentElement.setAttribute('data-copy-added', 'true');
var btn = document.createElement('button');
btn.textContent = 'Copy';
btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';
btn.onmouseover = function() { this.style.opacity = '1'; };
btn.onmouseout = function() { this.style.opacity = '0.7'; };
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navigator.clipboard.writeText(codeBlock.textContent).then(function() {
btn.textContent = 'Copied!';
setTimeout(function() { btn.textContent = 'Copy'; }, 1500);
});
};
codeBlock.parentElement.style.position = 'relative';
codeBlock.parentElement.appendChild(btn);
});
}
addCopyButtons();
// Re-run on dynamic content
var observer = new MutationObserver(addCopyButtons);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
feat(credentials): add context.credentials WebAuthn virtual authenticator by pavelfeldman · Pull Request #40849 · microsoft/playwright · GitHub
Skip to content
feat(credentials): add context.credentials WebAuthn virtual authenticator - #40849
Merged
Pavel Feldman (pavelfeldman) merged 1 commit into
microsoft:mainfrom 
pavelfeldman:feat-webauthn
May 16, 2026
Merged
feat(credentials): add context.credentials WebAuthn virtual authenticator#40849
Pavel Feldman (pavelfeldman) merged 1 commit into
microsoft:mainfrom 
pavelfeldman:feat-webauthn
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@pavelfeldman
@pavelfeldmanPavel Feldman (pavelfeldman)
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May 14, 2026

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Summary
  • Adds BrowserContext.credentials — a flat, web-API-shaped namespace for seeding WebAuthn credentials and intercepting navigator.credentials.create/get ceremonies.
  • Implemented in userland via an injected script (server-side registry + ECDSA P-256 / CBOR / COSE; page-side override calls back through a binding). Works on Chromium, Firefox and WebKit with no per-browser code.
awaitcontext.credentials.create({rpId: 'example.com'});awaitcontext.credentials.get({ rpId });awaitcontext.credentials.delete(id);awaitcontext.credentials.setUserVerified(false);
Fixes#7276
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Comment threaddocs/src/api/class-credentials.md
Outdated

 - `id` <[string]> Base64url-encoded credential id.
 - `rpId` <[string]> Relying party id.
 - `userHandle` <[string]> Base64url-encoded user handle.
 - `privateKey` <[string]> PKCS#8 PEM-encoded private key.
@yury-sYury Semikhatsky (yury-s)May 14, 2026

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should also support path
Comment threaddocs/src/api/class-credentials.md
* since: v1.61
- returns: <[Object]>
 * alias: VirtualCredential
 - `id` <[string]> Base64url-encoded credential id.
@yury-sYury Semikhatsky (yury-s)May 14, 2026

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should playwright encode it itself?
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@pavelfeldman
feat(credentials): add context.credentials WebAuthn virtual authentic…
8c5fe9e
…ator
Adds a flat namespace on BrowserContext that intercepts the page's
navigator.credentials.create() / .get() calls and answers them with an
ES256 keypair Playwright owns. Implemented in userland via an injected
script + a binding, so it works on Chromium, Firefox and WebKit with no
per-browser code.
const context = await browser.newContext({ credentials: true });
await context.credentials.create({ rpId: 'example.com' });
// page's navigator.credentials.get() now succeeds silently.
Verbs mirror navigator.credentials; no authenticator entity. Server-side
registry handles keypair generation, CBOR/COSE encoding of attestation
objects, and ECDSA signing of assertions. Pass id/userHandle/privateKey/
publicKey together to import a pre-registered credential.
Fixes: microsoft#7276
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Test results for "MCP"
7099 passed, 1104 skipped
Merge workflow run.
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Test results for "tests 1"
4 flaky⚠️ [chromium-library] › library/beforeunload.spec.ts:130 › should support dismissing the dialog multiple times `@chromium-ubuntu-22.04-arm-node20` 
⚠️ [chromium-library] › library/video.spec.ts:682 › screencast › should capture full viewport on hidpi `@chromium-ubuntu-22.04-arm-node20` 
⚠️ [firefox-page] › page/page-add-locator-handler.spec.ts:263 › should wait for hidden by default `@firefox-ubuntu-22.04-node20` 
⚠️ [firefox-page] › page/page-emulate-media.spec.ts:144 › should keep reduced motion and color emulation after reload `@firefox-ubuntu-22.04-node20` 
41952 passed, 850 skipped
Merge workflow run.
@pavelfeldman
Pavel Feldman (pavelfeldman)
merged commit 72bbd1d
into
microsoft:mainMay 16, 2026

45 checks passed


This was referenced May 16, 2026

Closed


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mentioned this pull request
Jun 12, 2026
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[Feature] support WebAuthn


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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Force GitHub README to respect dark mode
(function() {
var style = document.createElement('style');
style.textContent = '
.markdown-body {
color-scheme: dark light;
}
.markdown-body pre { background: #161b22 !important; }
.markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }
.markdown-body table th, .markdown-body table td { border-color: #30363d !important; }
.markdown-body img { background: #0d1117; }
.markdown-body blockquote { border-left-color: #8b949e; }
.markdown-body hr { border-color: #30363d; }
';
document.head.appendChild(style);
})();
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
feat(credentials): add context.credentials WebAuthn virtual authenticator by pavelfeldman · Pull Request #40849 · microsoft/playwright · GitHub
Skip to content
feat(credentials): add context.credentials WebAuthn virtual authenticator - #40849
Merged
Pavel Feldman (pavelfeldman) merged 1 commit into
microsoft:mainfrom 
pavelfeldman:feat-webauthn
May 16, 2026
Merged
feat(credentials): add context.credentials WebAuthn virtual authenticator#40849
Pavel Feldman (pavelfeldman) merged 1 commit into
microsoft:mainfrom 
pavelfeldman:feat-webauthn
Conversation
@pavelfeldman
@pavelfeldmanPavel Feldman (pavelfeldman)
commented
May 14, 2026

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Summary
  • Adds BrowserContext.credentials — a flat, web-API-shaped namespace for seeding WebAuthn credentials and intercepting navigator.credentials.create/get ceremonies.
  • Implemented in userland via an injected script (server-side registry + ECDSA P-256 / CBOR / COSE; page-side override calls back through a binding). Works on Chromium, Firefox and WebKit with no per-browser code.
awaitcontext.credentials.create({rpId: 'example.com'});awaitcontext.credentials.get({ rpId });awaitcontext.credentials.delete(id);awaitcontext.credentials.setUserVerified(false);
Fixes#7276
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yury-s
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approved these changes
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View reviewed changes
Comment threaddocs/src/api/class-credentials.md
Outdated

 - `id` <[string]> Base64url-encoded credential id.
 - `rpId` <[string]> Relying party id.
 - `userHandle` <[string]> Base64url-encoded user handle.
 - `privateKey` <[string]> PKCS#8 PEM-encoded private key.
@yury-sYury Semikhatsky (yury-s)May 14, 2026

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should also support path
Comment threaddocs/src/api/class-credentials.md
* since: v1.61
- returns: <[Object]>
 * alias: VirtualCredential
 - `id` <[string]> Base64url-encoded credential id.
@yury-sYury Semikhatsky (yury-s)May 14, 2026

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should playwright encode it itself?
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@pavelfeldman
feat(credentials): add context.credentials WebAuthn virtual authentic…
8c5fe9e
…ator
Adds a flat namespace on BrowserContext that intercepts the page's
navigator.credentials.create() / .get() calls and answers them with an
ES256 keypair Playwright owns. Implemented in userland via an injected
script + a binding, so it works on Chromium, Firefox and WebKit with no
per-browser code.
const context = await browser.newContext({ credentials: true });
await context.credentials.create({ rpId: 'example.com' });
// page's navigator.credentials.get() now succeeds silently.
Verbs mirror navigator.credentials; no authenticator entity. Server-side
registry handles keypair generation, CBOR/COSE encoding of attestation
objects, and ECDSA signing of assertions. Pass id/userHandle/privateKey/
publicKey together to import a pre-registered credential.
Fixes: microsoft#7276
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Test results for "MCP"
7099 passed, 1104 skipped
Merge workflow run.
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Test results for "tests 1"
4 flaky⚠️ [chromium-library] › library/beforeunload.spec.ts:130 › should support dismissing the dialog multiple times `@chromium-ubuntu-22.04-arm-node20` 
⚠️ [chromium-library] › library/video.spec.ts:682 › screencast › should capture full viewport on hidpi `@chromium-ubuntu-22.04-arm-node20` 
⚠️ [firefox-page] › page/page-add-locator-handler.spec.ts:263 › should wait for hidden by default `@firefox-ubuntu-22.04-node20` 
⚠️ [firefox-page] › page/page-emulate-media.spec.ts:144 › should keep reduced motion and color emulation after reload `@firefox-ubuntu-22.04-node20` 
41952 passed, 850 skipped
Merge workflow run.
@pavelfeldman
Pavel Feldman (pavelfeldman)
merged commit 72bbd1d
into
microsoft:mainMay 16, 2026

45 checks passed


This was referenced May 16, 2026

Closed


Closed


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@yury-sYury Semikhatsky (yury-s)
mentioned this pull request
Jun 12, 2026
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[Feature] support WebAuthn


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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Highlight search terms from Google/DuckDuckGo/Bing referrer
(function() {
var ref = document.referrer;
var terms = [];
if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {
var url = new URL(ref);
var q = url.searchParams.get('q') || url.searchParams.get('p');
if (q) {
terms = q.split(/\s+/).filter(function(t) { return t.length > 2; });
}
}
if (terms.length === 0) return;
var style = document.createElement('style');
style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';
document.head.appendChild(style);
function highlight(node) {
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var text = node.textContent;
var found = false;
terms.forEach(function(term) {
var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi');
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found = true;
var frag = document.createDocumentFragment();
var parts = text.split(regex);
parts.forEach(function(part, i) {
if (i % 2 === 0) {
frag.appendChild(document.createTextNode(part));
} else {
var span = document.createElement('span');
span.className = 'userscript-highlight';
span.textContent = part;
frag.appendChild(span);
}
});
node.parentNode.replaceChild(frag, node);
}
});
} else if (node.nodeType === 1 && node.childNodes) { // element
var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];
if (!skipTags.includes(node.tagName)) {
Array.from(node.childNodes).forEach(highlight);
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highlight(document.body);
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mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1 || node.nodeType === 3) highlight(node);
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observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
feat(credentials): add context.credentials WebAuthn virtual authenticator by pavelfeldman · Pull Request #40849 · microsoft/playwright · GitHub
Skip to content
feat(credentials): add context.credentials WebAuthn virtual authenticator - #40849
Merged
Pavel Feldman (pavelfeldman) merged 1 commit into
microsoft:mainfrom 
pavelfeldman:feat-webauthn
May 16, 2026
Merged
feat(credentials): add context.credentials WebAuthn virtual authenticator#40849
Pavel Feldman (pavelfeldman) merged 1 commit into
microsoft:mainfrom 
pavelfeldman:feat-webauthn
Conversation
@pavelfeldman
@pavelfeldmanPavel Feldman (pavelfeldman)
commented
May 14, 2026

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Summary
  • Adds BrowserContext.credentials — a flat, web-API-shaped namespace for seeding WebAuthn credentials and intercepting navigator.credentials.create/get ceremonies.
  • Implemented in userland via an injected script (server-side registry + ECDSA P-256 / CBOR / COSE; page-side override calls back through a binding). Works on Chromium, Firefox and WebKit with no per-browser code.
awaitcontext.credentials.create({rpId: 'example.com'});awaitcontext.credentials.get({ rpId });awaitcontext.credentials.delete(id);awaitcontext.credentials.setUserVerified(false);
Fixes#7276
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Comment threaddocs/src/api/class-credentials.md
Outdated

 - `id` <[string]> Base64url-encoded credential id.
 - `rpId` <[string]> Relying party id.
 - `userHandle` <[string]> Base64url-encoded user handle.
 - `privateKey` <[string]> PKCS#8 PEM-encoded private key.
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should also support path
Comment threaddocs/src/api/class-credentials.md
* since: v1.61
- returns: <[Object]>
 * alias: VirtualCredential
 - `id` <[string]> Base64url-encoded credential id.
@yury-sYury Semikhatsky (yury-s)May 14, 2026

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should playwright encode it itself?
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@pavelfeldman
feat(credentials): add context.credentials WebAuthn virtual authentic…
8c5fe9e
…ator
Adds a flat namespace on BrowserContext that intercepts the page's
navigator.credentials.create() / .get() calls and answers them with an
ES256 keypair Playwright owns. Implemented in userland via an injected
script + a binding, so it works on Chromium, Firefox and WebKit with no
per-browser code.
const context = await browser.newContext({ credentials: true });
await context.credentials.create({ rpId: 'example.com' });
// page's navigator.credentials.get() now succeeds silently.
Verbs mirror navigator.credentials; no authenticator entity. Server-side
registry handles keypair generation, CBOR/COSE encoding of attestation
objects, and ECDSA signing of assertions. Pass id/userHandle/privateKey/
publicKey together to import a pre-registered credential.
Fixes: microsoft#7276
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Test results for "MCP"
7099 passed, 1104 skipped
Merge workflow run.
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Test results for "tests 1"
4 flaky⚠️ [chromium-library] › library/beforeunload.spec.ts:130 › should support dismissing the dialog multiple times `@chromium-ubuntu-22.04-arm-node20` 
⚠️ [chromium-library] › library/video.spec.ts:682 › screencast › should capture full viewport on hidpi `@chromium-ubuntu-22.04-arm-node20` 
⚠️ [firefox-page] › page/page-add-locator-handler.spec.ts:263 › should wait for hidden by default `@firefox-ubuntu-22.04-node20` 
⚠️ [firefox-page] › page/page-emulate-media.spec.ts:144 › should keep reduced motion and color emulation after reload `@firefox-ubuntu-22.04-node20` 
41952 passed, 850 skipped
Merge workflow run.
@pavelfeldman
Pavel Feldman (pavelfeldman)
merged commit 72bbd1d
into
microsoft:mainMay 16, 2026

45 checks passed


This was referenced May 16, 2026

Closed


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Jun 12, 2026
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[Feature] support WebAuthn


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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
u.searchParams.delete(p);
changed = true;
}
});
return changed ? u.toString() : url;
} catch (e) {
return url;
}
}
function cleanLinks() {
document.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
cleanLinks();
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1) {
if (node.tagName === 'A') cleanLinks();
node.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
feat(credentials): add context.credentials WebAuthn virtual authenticator by pavelfeldman · Pull Request #40849 · microsoft/playwright · GitHub
Skip to content
feat(credentials): add context.credentials WebAuthn virtual authenticator - #40849
Merged
Pavel Feldman (pavelfeldman) merged 1 commit into
microsoft:mainfrom 
pavelfeldman:feat-webauthn
May 16, 2026
Merged
feat(credentials): add context.credentials WebAuthn virtual authenticator#40849
Pavel Feldman (pavelfeldman) merged 1 commit into
microsoft:mainfrom 
pavelfeldman:feat-webauthn
Conversation
@pavelfeldman
@pavelfeldmanPavel Feldman (pavelfeldman)
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May 14, 2026

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Summary
  • Adds BrowserContext.credentials — a flat, web-API-shaped namespace for seeding WebAuthn credentials and intercepting navigator.credentials.create/get ceremonies.
  • Implemented in userland via an injected script (server-side registry + ECDSA P-256 / CBOR / COSE; page-side override calls back through a binding). Works on Chromium, Firefox and WebKit with no per-browser code.
awaitcontext.credentials.create({rpId: 'example.com'});awaitcontext.credentials.get({ rpId });awaitcontext.credentials.delete(id);awaitcontext.credentials.setUserVerified(false);
Fixes#7276
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Yury Semikhatsky (yury-s)
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Comment threaddocs/src/api/class-credentials.md
Outdated

 - `id` <[string]> Base64url-encoded credential id.
 - `rpId` <[string]> Relying party id.
 - `userHandle` <[string]> Base64url-encoded user handle.
 - `privateKey` <[string]> PKCS#8 PEM-encoded private key.
@yury-sYury Semikhatsky (yury-s)May 14, 2026

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should also support path
Comment threaddocs/src/api/class-credentials.md
* since: v1.61
- returns: <[Object]>
 * alias: VirtualCredential
 - `id` <[string]> Base64url-encoded credential id.
@yury-sYury Semikhatsky (yury-s)May 14, 2026

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should playwright encode it itself?
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@pavelfeldman
feat(credentials): add context.credentials WebAuthn virtual authentic…
8c5fe9e
…ator
Adds a flat namespace on BrowserContext that intercepts the page's
navigator.credentials.create() / .get() calls and answers them with an
ES256 keypair Playwright owns. Implemented in userland via an injected
script + a binding, so it works on Chromium, Firefox and WebKit with no
per-browser code.
const context = await browser.newContext({ credentials: true });
await context.credentials.create({ rpId: 'example.com' });
// page's navigator.credentials.get() now succeeds silently.
Verbs mirror navigator.credentials; no authenticator entity. Server-side
registry handles keypair generation, CBOR/COSE encoding of attestation
objects, and ECDSA signing of assertions. Pass id/userHandle/privateKey/
publicKey together to import a pre-registered credential.
Fixes: microsoft#7276
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Test results for "MCP"
7099 passed, 1104 skipped
Merge workflow run.
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Test results for "tests 1"
4 flaky⚠️ [chromium-library] › library/beforeunload.spec.ts:130 › should support dismissing the dialog multiple times `@chromium-ubuntu-22.04-arm-node20` 
⚠️ [chromium-library] › library/video.spec.ts:682 › screencast › should capture full viewport on hidpi `@chromium-ubuntu-22.04-arm-node20` 
⚠️ [firefox-page] › page/page-add-locator-handler.spec.ts:263 › should wait for hidden by default `@firefox-ubuntu-22.04-node20` 
⚠️ [firefox-page] › page/page-emulate-media.spec.ts:144 › should keep reduced motion and color emulation after reload `@firefox-ubuntu-22.04-node20` 
41952 passed, 850 skipped
Merge workflow run.
@pavelfeldman
Pavel Feldman (pavelfeldman)
merged commit 72bbd1d
into
microsoft:mainMay 16, 2026

45 checks passed


This was referenced May 16, 2026

Closed


Closed


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@yury-sYury Semikhatsky (yury-s)
mentioned this pull request
Jun 12, 2026
 Merged

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[Feature] support WebAuthn


2 participants

@pavelfeldman@yury-s

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
if (btn && !btn.classList.contains('activated')) {
btn.click();
}
}
// Try immediately
tryTheater();
// Try after navigation (SPA)
var lastUrl = location.href;
setInterval(function() {
if (location.href !== lastUrl) {
lastUrl = location.href;
setTimeout(tryTheater, 500);
}
}, 1000);
// Also try on player load
var observer = new MutationObserver(tryTheater);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
feat(credentials): add context.credentials WebAuthn virtual authenticator by pavelfeldman · Pull Request #40849 · microsoft/playwright · GitHub
Skip to content
feat(credentials): add context.credentials WebAuthn virtual authenticator - #40849
Merged
Pavel Feldman (pavelfeldman) merged 1 commit into
microsoft:mainfrom 
pavelfeldman:feat-webauthn
May 16, 2026
Merged
feat(credentials): add context.credentials WebAuthn virtual authenticator#40849
Pavel Feldman (pavelfeldman) merged 1 commit into
microsoft:mainfrom 
pavelfeldman:feat-webauthn
Conversation
@pavelfeldman
@pavelfeldmanPavel Feldman (pavelfeldman)
commented
May 14, 2026

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Summary
  • Adds BrowserContext.credentials — a flat, web-API-shaped namespace for seeding WebAuthn credentials and intercepting navigator.credentials.create/get ceremonies.
  • Implemented in userland via an injected script (server-side registry + ECDSA P-256 / CBOR / COSE; page-side override calls back through a binding). Works on Chromium, Firefox and WebKit with no per-browser code.
awaitcontext.credentials.create({rpId: 'example.com'});awaitcontext.credentials.get({ rpId });awaitcontext.credentials.delete(id);awaitcontext.credentials.setUserVerified(false);
Fixes#7276
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Yury Semikhatsky (yury-s)
approved these changes
May 14, 2026
View reviewed changes
Comment threaddocs/src/api/class-credentials.md
Outdated

 - `id` <[string]> Base64url-encoded credential id.
 - `rpId` <[string]> Relying party id.
 - `userHandle` <[string]> Base64url-encoded user handle.
 - `privateKey` <[string]> PKCS#8 PEM-encoded private key.
@yury-sYury Semikhatsky (yury-s)May 14, 2026

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should also support path
Comment threaddocs/src/api/class-credentials.md
* since: v1.61
- returns: <[Object]>
 * alias: VirtualCredential
 - `id` <[string]> Base64url-encoded credential id.
@yury-sYury Semikhatsky (yury-s)May 14, 2026

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should playwright encode it itself?
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@pavelfeldman
feat(credentials): add context.credentials WebAuthn virtual authentic…
8c5fe9e
…ator
Adds a flat namespace on BrowserContext that intercepts the page's
navigator.credentials.create() / .get() calls and answers them with an
ES256 keypair Playwright owns. Implemented in userland via an injected
script + a binding, so it works on Chromium, Firefox and WebKit with no
per-browser code.
const context = await browser.newContext({ credentials: true });
await context.credentials.create({ rpId: 'example.com' });
// page's navigator.credentials.get() now succeeds silently.
Verbs mirror navigator.credentials; no authenticator entity. Server-side
registry handles keypair generation, CBOR/COSE encoding of attestation
objects, and ECDSA signing of assertions. Pass id/userHandle/privateKey/
publicKey together to import a pre-registered credential.
Fixes: microsoft#7276
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Test results for "MCP"
7099 passed, 1104 skipped
Merge workflow run.
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Test results for "tests 1"
4 flaky⚠️ [chromium-library] › library/beforeunload.spec.ts:130 › should support dismissing the dialog multiple times `@chromium-ubuntu-22.04-arm-node20` 
⚠️ [chromium-library] › library/video.spec.ts:682 › screencast › should capture full viewport on hidpi `@chromium-ubuntu-22.04-arm-node20` 
⚠️ [firefox-page] › page/page-add-locator-handler.spec.ts:263 › should wait for hidden by default `@firefox-ubuntu-22.04-node20` 
⚠️ [firefox-page] › page/page-emulate-media.spec.ts:144 › should keep reduced motion and color emulation after reload `@firefox-ubuntu-22.04-node20` 
41952 passed, 850 skipped
Merge workflow run.
@pavelfeldman
Pavel Feldman (pavelfeldman)
merged commit 72bbd1d
into
microsoft:mainMay 16, 2026

45 checks passed


This was referenced May 16, 2026

Closed


Closed


Closed

@yury-sYury Semikhatsky (yury-s)
mentioned this pull request
Jun 12, 2026
 Merged

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Successfully merging this pull request may close these issues.

[Feature] support WebAuthn


2 participants

@pavelfeldman@yury-s

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {
el.style.position = 'static';
el.style.top = 'auto';
el.style.zIndex = 'auto';
}
});
}
unstick();
var observer = new MutationObserver(unstick);
observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
})();
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
feat(credentials): add context.credentials WebAuthn virtual authenticator by pavelfeldman · Pull Request #40849 · microsoft/playwright · GitHub
Skip to content
feat(credentials): add context.credentials WebAuthn virtual authenticator - #40849
Merged
Pavel Feldman (pavelfeldman) merged 1 commit into
microsoft:mainfrom 
pavelfeldman:feat-webauthn
May 16, 2026
Merged
feat(credentials): add context.credentials WebAuthn virtual authenticator#40849
Pavel Feldman (pavelfeldman) merged 1 commit into
microsoft:mainfrom 
pavelfeldman:feat-webauthn
Conversation
@pavelfeldman
@pavelfeldmanPavel Feldman (pavelfeldman)
commented
May 14, 2026

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Summary
  • Adds BrowserContext.credentials — a flat, web-API-shaped namespace for seeding WebAuthn credentials and intercepting navigator.credentials.create/get ceremonies.
  • Implemented in userland via an injected script (server-side registry + ECDSA P-256 / CBOR / COSE; page-side override calls back through a binding). Works on Chromium, Firefox and WebKit with no per-browser code.
awaitcontext.credentials.create({rpId: 'example.com'});awaitcontext.credentials.get({ rpId });awaitcontext.credentials.delete(id);awaitcontext.credentials.setUserVerified(false);
Fixes#7276
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yury-s
Yury Semikhatsky (yury-s)
approved these changes
May 14, 2026
View reviewed changes
Comment threaddocs/src/api/class-credentials.md
Outdated

 - `id` <[string]> Base64url-encoded credential id.
 - `rpId` <[string]> Relying party id.
 - `userHandle` <[string]> Base64url-encoded user handle.
 - `privateKey` <[string]> PKCS#8 PEM-encoded private key.
@yury-sYury Semikhatsky (yury-s)May 14, 2026

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should also support path
Comment threaddocs/src/api/class-credentials.md
* since: v1.61
- returns: <[Object]>
 * alias: VirtualCredential
 - `id` <[string]> Base64url-encoded credential id.
@yury-sYury Semikhatsky (yury-s)May 14, 2026

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should playwright encode it itself?
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@pavelfeldman
feat(credentials): add context.credentials WebAuthn virtual authentic…
8c5fe9e
…ator
Adds a flat namespace on BrowserContext that intercepts the page's
navigator.credentials.create() / .get() calls and answers them with an
ES256 keypair Playwright owns. Implemented in userland via an injected
script + a binding, so it works on Chromium, Firefox and WebKit with no
per-browser code.
const context = await browser.newContext({ credentials: true });
await context.credentials.create({ rpId: 'example.com' });
// page's navigator.credentials.get() now succeeds silently.
Verbs mirror navigator.credentials; no authenticator entity. Server-side
registry handles keypair generation, CBOR/COSE encoding of attestation
objects, and ECDSA signing of assertions. Pass id/userHandle/privateKey/
publicKey together to import a pre-registered credential.
Fixes: microsoft#7276
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Test results for "MCP"
7099 passed, 1104 skipped
Merge workflow run.
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Test results for "tests 1"
4 flaky⚠️ [chromium-library] › library/beforeunload.spec.ts:130 › should support dismissing the dialog multiple times `@chromium-ubuntu-22.04-arm-node20` 
⚠️ [chromium-library] › library/video.spec.ts:682 › screencast › should capture full viewport on hidpi `@chromium-ubuntu-22.04-arm-node20` 
⚠️ [firefox-page] › page/page-add-locator-handler.spec.ts:263 › should wait for hidden by default `@firefox-ubuntu-22.04-node20` 
⚠️ [firefox-page] › page/page-emulate-media.spec.ts:144 › should keep reduced motion and color emulation after reload `@firefox-ubuntu-22.04-node20` 
41952 passed, 850 skipped
Merge workflow run.
@pavelfeldman
Pavel Feldman (pavelfeldman)
merged commit 72bbd1d
into
microsoft:mainMay 16, 2026

45 checks passed


This was referenced May 16, 2026

Closed


Closed


Closed

@yury-sYury Semikhatsky (yury-s)
mentioned this pull request
Jun 12, 2026
 Merged

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Successfully merging this pull request may close these issues.

[Feature] support WebAuthn


2 participants

@pavelfeldman@yury-s

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Universal Dark Mode - works on any site
(function() {
var enabled = true;
function applyDarkMode() {
if (!enabled) return;
// Create style element if it doesn't exist
var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
}
// Dark mode CSS - inverts colors but preserves images/video
style.textContent = '
/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
}
/* Restore images, videos, iframes, canvas */
img, video, iframe, canvas, svg, picture, [style*="background-image"] {
filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
.no-dark-mode, .no-dark-mode *,
[data-theme="light"], [data-theme="light"],
.ace_editor, .ace_editor *,
.CodeMirror, .CodeMirror *,
.monaco-editor, .monaco-editor *,
.markdown-body pre, .markdown-body pre *,
.highlight, .highlight *,
pre code, pre code * {
filter: none !important;
}
/* Fix common UI elements */
.modal, .popup, .dropdown-menu, .tooltip, .popover {
filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
}
/* Scrollbars */
::-webkit-scrollbar { background: #1a1a2e !important; }
::-webkit-scrollbar-thumb { background: #444 !important; }
::-webkit-scrollbar-thumb:hover { background: #555 !important; }
/* Selection */
::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
';
}
function removeDarkMode() {
var style = document.getElementById('universal-dark-mode-style');
if (style) style.remove();
}
// Toggle with Alt+Shift+D
document.addEventListener('keydown', function(e) {
if (e.altKey && e.shiftKey && e.key === 'D') {
e.preventDefault();
enabled = !enabled;
if (enabled) {
applyDarkMode();
console.log('[Universal Dark Mode] Enabled');
} else {
removeDarkMode();
console.log('[Universal Dark Mode] Disabled');
}
}
});
// Apply on load
applyDarkMode();
// Re-apply on dynamic content
var observer = new MutationObserver(function(mutations) {
if (enabled && !document.getElementById('universal-dark-mode-style')) {
applyDarkMode();
}
});
observer.observe(document.head, { childList: true });
console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');
})();
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();
feat(credentials): add context.credentials WebAuthn virtual authenticator by pavelfeldman · Pull Request #40849 · microsoft/playwright · GitHub
Skip to content
feat(credentials): add context.credentials WebAuthn virtual authenticator - #40849
Merged
Pavel Feldman (pavelfeldman) merged 1 commit into
microsoft:mainfrom 
pavelfeldman:feat-webauthn
May 16, 2026
Merged
feat(credentials): add context.credentials WebAuthn virtual authenticator#40849
Pavel Feldman (pavelfeldman) merged 1 commit into
microsoft:mainfrom 
pavelfeldman:feat-webauthn
Conversation
@pavelfeldman
@pavelfeldmanPavel Feldman (pavelfeldman)
commented
May 14, 2026

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Summary
  • Adds BrowserContext.credentials — a flat, web-API-shaped namespace for seeding WebAuthn credentials and intercepting navigator.credentials.create/get ceremonies.
  • Implemented in userland via an injected script (server-side registry + ECDSA P-256 / CBOR / COSE; page-side override calls back through a binding). Works on Chromium, Firefox and WebKit with no per-browser code.
awaitcontext.credentials.create({rpId: 'example.com'});awaitcontext.credentials.get({ rpId });awaitcontext.credentials.delete(id);awaitcontext.credentials.setUserVerified(false);
Fixes#7276
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yury-s
Yury Semikhatsky (yury-s)
approved these changes
May 14, 2026
View reviewed changes
Comment threaddocs/src/api/class-credentials.md
Outdated

 - `id` <[string]> Base64url-encoded credential id.
 - `rpId` <[string]> Relying party id.
 - `userHandle` <[string]> Base64url-encoded user handle.
 - `privateKey` <[string]> PKCS#8 PEM-encoded private key.
@yury-sYury Semikhatsky (yury-s)May 14, 2026

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should also support path
Comment threaddocs/src/api/class-credentials.md
* since: v1.61
- returns: <[Object]>
 * alias: VirtualCredential
 - `id` <[string]> Base64url-encoded credential id.
@yury-sYury Semikhatsky (yury-s)May 14, 2026

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should playwright encode it itself?
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@pavelfeldman
feat(credentials): add context.credentials WebAuthn virtual authentic…
8c5fe9e
…ator
Adds a flat namespace on BrowserContext that intercepts the page's
navigator.credentials.create() / .get() calls and answers them with an
ES256 keypair Playwright owns. Implemented in userland via an injected
script + a binding, so it works on Chromium, Firefox and WebKit with no
per-browser code.
const context = await browser.newContext({ credentials: true });
await context.credentials.create({ rpId: 'example.com' });
// page's navigator.credentials.get() now succeeds silently.
Verbs mirror navigator.credentials; no authenticator entity. Server-side
registry handles keypair generation, CBOR/COSE encoding of attestation
objects, and ECDSA signing of assertions. Pass id/userHandle/privateKey/
publicKey together to import a pre-registered credential.
Fixes: microsoft#7276
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@github-actions
github-actionsBot
commented
May 16, 2026

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Test results for "MCP"
7099 passed, 1104 skipped
Merge workflow run.
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May 16, 2026

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Test results for "tests 1"
4 flaky⚠️ [chromium-library] › library/beforeunload.spec.ts:130 › should support dismissing the dialog multiple times `@chromium-ubuntu-22.04-arm-node20` 
⚠️ [chromium-library] › library/video.spec.ts:682 › screencast › should capture full viewport on hidpi `@chromium-ubuntu-22.04-arm-node20` 
⚠️ [firefox-page] › page/page-add-locator-handler.spec.ts:263 › should wait for hidden by default `@firefox-ubuntu-22.04-node20` 
⚠️ [firefox-page] › page/page-emulate-media.spec.ts:144 › should keep reduced motion and color emulation after reload `@firefox-ubuntu-22.04-node20` 
41952 passed, 850 skipped
Merge workflow run.
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Pavel Feldman (pavelfeldman)
merged commit 72bbd1d
into
microsoft:mainMay 16, 2026

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This was referenced May 16, 2026

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@yury-sYury Semikhatsky (yury-s)
mentioned this pull request
Jun 12, 2026
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@yury-sYury Semikhatsky (yury-s)yury-s approved these changes

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[Feature] support WebAuthn


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