fix(app): restore middle mouse button click to close review/file tabs - #11686

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fix(app): restore middle mouse button click to close review/file tabs#11686
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@alexyaroshukalexyaroshuk commented Feb 1, 2026

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closes#11633

#11070 implemented scrollable tabs in review/file view section, but introduced an issue where middle clicking on a tab would enter scroll mode instead of closing the tab, unless the tabs are not scrollable (too few tabs)

What does this PR do?

This PR fixes the above bug so middle-click closes tabs like before.

The fix: Adding onMouseDown={(e) => { if (e.button === 1) e.preventDefault() }} prevents the default scroll-mode behavior at the mousedown event, before the browser enters scroll mode

Before

fix-tabs-mmb-to-close-tab_BEFORE.mp4

After

fix-tabs-mmb-to-close-tab_AFTER.mp4

How did you verify your code works?

e2e local test suite - same results before/after

manual testing:

  1. create many tabs so they can be scrolled
  2. press middle mouse button on a tab
  3. tab is closed

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The following comment was made by an LLM, it may be inaccurate:

No duplicate PRs found

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solved in upstream

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[FEATURE]: Middle click to close review tabs on desktop app

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, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n 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;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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fix(app): restore middle mouse button click to close review/file tabs - #11686
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fix(app): restore middle mouse button click to close review/file tabs#11686
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closes#11633
#11070 implemented scrollable tabs in review/file view section, but introduced an issue where middle clicking on a tab would enter scroll mode instead of closing the tab, unless the tabs are not scrollable (too few tabs)
What does this PR do?
This PR fixes the above bug so middle-click closes tabs like before.
The fix: Adding onMouseDown={(e) => { if (e.button === 1) e.preventDefault() }} prevents the default scroll-mode behavior at the mousedown event, before the browser enters scroll mode
Before
fix-tabs-mmb-to-close-tab_BEFORE.mp4
After
fix-tabs-mmb-to-close-tab_AFTER.mp4
How did you verify your code works?
e2e local test suite - same results before/after
manual testing:
  1. create many tabs so they can be scrolled
  2. press middle mouse button on a tab
  3. tab is closed
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The following comment was made by an LLM, it may be inaccurate:
No duplicate PRs found
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[FEATURE]: Middle click to close review tabs on desktop app


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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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@alexyaroshukalexyaroshuk
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closes#11633
#11070 implemented scrollable tabs in review/file view section, but introduced an issue where middle clicking on a tab would enter scroll mode instead of closing the tab, unless the tabs are not scrollable (too few tabs)
What does this PR do?
This PR fixes the above bug so middle-click closes tabs like before.
The fix: Adding onMouseDown={(e) => { if (e.button === 1) e.preventDefault() }} prevents the default scroll-mode behavior at the mousedown event, before the browser enters scroll mode
Before
fix-tabs-mmb-to-close-tab_BEFORE.mp4
After
fix-tabs-mmb-to-close-tab_AFTER.mp4
How did you verify your code works?
e2e local test suite - same results before/after
manual testing:
  1. create many tabs so they can be scrolled
  2. press middle mouse button on a tab
  3. tab is closed
@github-actions
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The following comment was made by an LLM, it may be inaccurate:
No duplicate PRs found
@alexyaroshuk
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Feb 11, 2026

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solved in upstream
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[FEATURE]: Middle click to close review tabs on desktop app


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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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fix(app): restore middle mouse button click to close review/file tabs - #11686
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fix(app): restore middle mouse button click to close review/file tabs#11686
alexyaroshuk wants to merge 1 commit into
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@alexyaroshukalexyaroshuk
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closes#11633
#11070 implemented scrollable tabs in review/file view section, but introduced an issue where middle clicking on a tab would enter scroll mode instead of closing the tab, unless the tabs are not scrollable (too few tabs)
What does this PR do?
This PR fixes the above bug so middle-click closes tabs like before.
The fix: Adding onMouseDown={(e) => { if (e.button === 1) e.preventDefault() }} prevents the default scroll-mode behavior at the mousedown event, before the browser enters scroll mode
Before
fix-tabs-mmb-to-close-tab_BEFORE.mp4
After
fix-tabs-mmb-to-close-tab_AFTER.mp4
How did you verify your code works?
e2e local test suite - same results before/after
manual testing:
  1. create many tabs so they can be scrolled
  2. press middle mouse button on a tab
  3. tab is closed
@github-actions
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Feb 1, 2026

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The following comment was made by an LLM, it may be inaccurate:
No duplicate PRs found
@alexyaroshuk
alexyaroshuk
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Feb 11, 2026

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solved in upstream
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[FEATURE]: Middle click to close review tabs on desktop app


1 participant

@alexyaroshuk

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

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fix(app): restore middle mouse button click to close review/file tabs - #11686
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fix(app): restore middle mouse button click to close review/file tabs#11686
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closes#11633
#11070 implemented scrollable tabs in review/file view section, but introduced an issue where middle clicking on a tab would enter scroll mode instead of closing the tab, unless the tabs are not scrollable (too few tabs)
What does this PR do?
This PR fixes the above bug so middle-click closes tabs like before.
The fix: Adding onMouseDown={(e) => { if (e.button === 1) e.preventDefault() }} prevents the default scroll-mode behavior at the mousedown event, before the browser enters scroll mode
Before
fix-tabs-mmb-to-close-tab_BEFORE.mp4
After
fix-tabs-mmb-to-close-tab_AFTER.mp4
How did you verify your code works?
e2e local test suite - same results before/after
manual testing:
  1. create many tabs so they can be scrolled
  2. press middle mouse button on a tab
  3. tab is closed
@github-actions
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Feb 1, 2026

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The following comment was made by an LLM, it may be inaccurate:
No duplicate PRs found
@alexyaroshuk
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Feb 11, 2026

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solved in upstream
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[FEATURE]: Middle click to close review tabs on desktop app


1 participant

@alexyaroshuk

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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fix(app): restore middle mouse button click to close review/file tabs - #11686
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fix(app): restore middle mouse button click to close review/file tabs#11686
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@alexyaroshukalexyaroshuk
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closes#11633
#11070 implemented scrollable tabs in review/file view section, but introduced an issue where middle clicking on a tab would enter scroll mode instead of closing the tab, unless the tabs are not scrollable (too few tabs)
What does this PR do?
This PR fixes the above bug so middle-click closes tabs like before.
The fix: Adding onMouseDown={(e) => { if (e.button === 1) e.preventDefault() }} prevents the default scroll-mode behavior at the mousedown event, before the browser enters scroll mode
Before
fix-tabs-mmb-to-close-tab_BEFORE.mp4
After
fix-tabs-mmb-to-close-tab_AFTER.mp4
How did you verify your code works?
e2e local test suite - same results before/after
manual testing:
  1. create many tabs so they can be scrolled
  2. press middle mouse button on a tab
  3. tab is closed
@github-actions
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Feb 1, 2026

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The following comment was made by an LLM, it may be inaccurate:
No duplicate PRs found
@alexyaroshuk
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Feb 11, 2026

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solved in upstream
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[FEATURE]: Middle click to close review tabs on desktop app


1 participant

@alexyaroshuk

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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fix(app): restore middle mouse button click to close review/file tabs - #11686
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@alexyaroshukalexyaroshuk
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closes#11633
#11070 implemented scrollable tabs in review/file view section, but introduced an issue where middle clicking on a tab would enter scroll mode instead of closing the tab, unless the tabs are not scrollable (too few tabs)
What does this PR do?
This PR fixes the above bug so middle-click closes tabs like before.
The fix: Adding onMouseDown={(e) => { if (e.button === 1) e.preventDefault() }} prevents the default scroll-mode behavior at the mousedown event, before the browser enters scroll mode
Before
fix-tabs-mmb-to-close-tab_BEFORE.mp4
After
fix-tabs-mmb-to-close-tab_AFTER.mp4
How did you verify your code works?
e2e local test suite - same results before/after
manual testing:
  1. create many tabs so they can be scrolled
  2. press middle mouse button on a tab
  3. tab is closed
@github-actions
github-actionsBot
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Feb 1, 2026

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The following comment was made by an LLM, it may be inaccurate:
No duplicate PRs found
@alexyaroshuk
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Feb 11, 2026

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solved in upstream
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[FEATURE]: Middle click to close review tabs on desktop app


1 participant

@alexyaroshuk

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
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fix(app): restore middle mouse button click to close review/file tabs - #11686
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alexyaroshuk wants to merge 1 commit into
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alexyaroshuk:fix/middle-click-tab-close
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fix(app): restore middle mouse button click to close review/file tabs#11686
alexyaroshuk wants to merge 1 commit into
anomalyco:devfrom 
alexyaroshuk:fix/middle-click-tab-close
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@alexyaroshuk
@alexyaroshukalexyaroshuk
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Feb 1, 2026

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closes#11633
#11070 implemented scrollable tabs in review/file view section, but introduced an issue where middle clicking on a tab would enter scroll mode instead of closing the tab, unless the tabs are not scrollable (too few tabs)
What does this PR do?
This PR fixes the above bug so middle-click closes tabs like before.
The fix: Adding onMouseDown={(e) => { if (e.button === 1) e.preventDefault() }} prevents the default scroll-mode behavior at the mousedown event, before the browser enters scroll mode
Before
fix-tabs-mmb-to-close-tab_BEFORE.mp4
After
fix-tabs-mmb-to-close-tab_AFTER.mp4
How did you verify your code works?
e2e local test suite - same results before/after
manual testing:
  1. create many tabs so they can be scrolled
  2. press middle mouse button on a tab
  3. tab is closed
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Feb 1, 2026

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The following comment was made by an LLM, it may be inaccurate:
No duplicate PRs found
@alexyaroshuk
alexyaroshuk
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Feb 11, 2026

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solved in upstream
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@adamdotdevinadamdotdevinAwaiting requested review from adamdotdevin

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[FEATURE]: Middle click to close review tabs on desktop app


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@alexyaroshuk