Wed Jul 17 2024 22:40:29 PDT
  • Keywords: perf:frontend
131 bugs found.
ID Type Summary Product Comp Assignee▲ Status▲ Resolution Updated
1869745 V115.15.1 (Supernova) Shifting of window border lasts up to 10 sconds Thunderbird Mail Window Front En nobody UNCO --- 2024-01-14
1533771 Preferences always initialize all the panes through findInPage.js initialization Firefox Settings UI nobody NEW --- 2023-09-21
1426357 buildFontList causes jank soon after displaying about:preferences Firefox Settings UI nobody NEW --- 2024-03-21
1450626 The early blank window should use the about:home background color Firefox General nobody NEW --- 2023-03-23
1529309 New tab page instances use more memory than new browser.xhtml instances and they shouldn't Firefox New Tab Page nobody NEW --- 2024-06-28
1542031 FxA toolbar icon flicker on browser startup Firefox Firefox Accounts nobody NEW --- 2024-04-02
1556688 Reduce TouchBar NSImage creation Core Widget: Cocoa nobody NEW --- 2024-04-02
1601950 7.07 - 8.42% about_preferences_basic (windows10-64-shippable, windows10-64-shippable-qr) regression on push 2d39de2be1ae9fa8063a19b459d8712fa90bc851 (Wed December 4 2019) Firefox Settings UI nobody NEW --- 2024-04-02
1614689 0.12ms uninterruptible reflow at _ensureFormattedHostVisible/<@resource:///modules/UrlbarValueFormatter.sys.mjs:96:9 Firefox Address Bar nobody NEW --- 2024-04-03
1658766 Page load for about:logins is slow on Windows Firefox about:logins nobody NEW --- 2024-04-02
1630999 webRequest overhead for data: urls from about:newtab Firefox New Tab Page mconley NEW --- 2022-03-08
490714 [meta] Implement an Asynchronous API for opening container query nodes Toolkit Places nobody NEW --- 2024-03-22
830504 Firefox should abort on tryserver when executing SQL on the main thread Toolkit Storage nobody NEW --- 2023-07-18
890712 nsIOService::NewFileURI is doing main thread IO and causes jank Core Networking nobody NEW --- 2024-04-01
1047817 Make bookmarks toolbar view use async openContainer Toolkit Places nobody NEW --- 2023-05-11
1355456 Investigate preparing the next tab on mousedown on the tab close button Firefox Tabbed Browser nobody NEW --- 2023-07-18
1356532 Try avoiding layout flushes in autocomplete::_handleOverflow Toolkit Autocomplete nobody NEW --- 2024-03-22
1357710 Uninitializing UITour is expensive Firefox Tours nobody NEW --- 2024-03-22
1358816 0.92ms uninterruptible reflow at _animateTabMove@chrome://browser/content/tabbrowser.xml:6165:26 Firefox Tabbed Browser nobody NEW --- 2023-07-18
1359408 0.29ms uninterruptible reflow at _handleDOMChange@chrome://extensions/content/ext-browser-content.js:215:24 WebExtensions Frontend nobody NEW --- 2023-07-18
1361635 1.19ms uninterruptible reflow from window.innerWidth at getContentSize@resource://gre/modules/PageThumbUtils.jsm:112:9 Core DOM: Core & HTML nobody NEW --- 2023-07-18
1371348 formautofill shouldn't load anything before opening and painting the first browser window Toolkit Form Autofill nobody NEW --- 2024-04-20
1374216 Add-on icons should be in the navbar by first paint Firefox Toolbars and Customi nobody NEW --- 2022-10-11
1380314 'Find Again' is slow Core Find Backend nobody NEW --- 2024-04-02
1386206 Breaking FormData's collect loop into chunks to be executed in idle dispatch Firefox Session Restore nobody NEW --- 2023-07-18
1388387 More aggressively switch to the next tab when closing a tab, even with a beforeunload handler Firefox Tabbed Browser nobody NEW --- 2023-08-17
1388758 Restoring sessions with multiple windows is very slow Firefox Session Restore nobody NEW --- 2023-07-13
1395066 Breaking tab data collection into chunks Firefox Session Restore nobody NEW --- 2023-07-18
1401214 Investigate code early initializing the Places Connection on startup Toolkit Places nobody NEW --- 2023-07-18
1402458 When clicking "show sidebars", resulting in not smooth page content shifting then resizing Firefox General nobody NEW --- 2023-09-21
1424377 Add more reflow tests for some tab cases Firefox Tabbed Browser nobody NEW --- 2024-03-22
1425887 With tab animations disabled, closing current tab to switch to another will visibly show a blank page with spinner (causing flashing) Firefox Tabbed Browser nobody NEW --- 2023-03-15
1438989 Allow to cancel page-icon fetches if the menu requesting them closes, or give those events a lower priority Toolkit Places nobody NEW --- 2023-05-22
1439892 Activity stream initialization causes jank after receiving the sessionstore-windows-restored notification Firefox New Tab Page nobody NEW --- 2024-04-02
1441005 Make reflow tests handle reflows occurring within setTimeout handlers Firefox General nobody NEW --- 2023-07-18
1444886 When closing a tab, select the next tab at the same time as the closed tab disappears Firefox Tabbed Browser nobody NEW --- 2023-03-23
1451375 nsLoginManager does main thread IO to query storage when the login list is shown Toolkit Password Manager nobody NEW --- 2023-07-18
1451401 Opening a new tab and then causing a Switch To tab from the AwesomeBar always results in a short spinner Firefox Tabbed Browser nobody NEW --- 2024-03-22
1452388 PageThumbs spends an appreciable amount of time on the main thread Firefox New Tab Page nobody NEW --- 2023-03-23
1455058 Short spinner reported when tearing tabs out of a window Firefox Tabbed Browser nobody NEW --- 2023-07-18
1458894 Window title in the taskbar changes multiple times when restoring session Firefox Session Restore nobody NEW --- 2022-10-17
1479083 URL bar seems to trigger multiple layouts when browser window is resized at certain sizes Firefox Toolbars and Customi nobody NEW --- 2024-03-22
1482654 1.43ms uninterruptible reflow at onxblunderflow@chrome://browser/content/tabbrowser.xml:47:11 Firefox Tabbed Browser nobody NEW --- 2024-04-02
1482670 1.38ms uninterruptible reflow at recreatePopup@resource:///modules/UITour.jsm:1443:5 Firefox Tours nobody NEW --- 2023-09-21
1482671 2.32ms uninterruptible reflow at showHighlightElement@resource:///modules/UITour.jsm:1046:24 Firefox Tours nobody NEW --- 2024-04-03
1485393 Add automated tests that detect style flushes (even if they're not layout flushes) Firefox General nobody NEW --- 2024-04-03
1487822 4.13ms uninterruptible reflow at openContextMenu@chrome://browser/content/nsContextMenu.js:80:3 Firefox Menus nobody NEW --- 2023-09-21
1490095 Put <browser> elements from closed <tab>'s into a queue to be destroyed during idle time Firefox Tabbed Browser nobody NEW --- 2024-04-02
1515799 [meta] reduce impact/overhead of custom element use on startup Firefox General nobody NEW --- 2023-08-04
1517784 Consider having a talos or other performance test for shutdown performance Testing Talos nobody NEW --- 2024-05-13
1527918 Consider not listening for / acting on mozafterpaint for non-remote browsers in async tab switcher code Firefox Tabbed Browser nobody NEW --- 2024-04-03
1534371 Lazy load browser.xul menus Firefox Menus nobody NEW --- 2023-08-04
1540832 Consider using idle task for preloaded new tab browsers created when opening new tabs Firefox Tabbed Browser nobody NEW --- 2023-09-21
1547139 Make AddonManager startup less expensive in a brand new profile or after an update Toolkit Add-ons Manager nobody NEW --- 2023-06-14
1570271 Opening the preferences page calls HomePage -> getHomepagePref 80 times Firefox Settings UI nobody NEW --- 2023-09-21
1575743 Create an automated test to ensure we use subpixel AA for titlebar/tabstrip/toolbar text rendering in WebRender Firefox Theme nobody NEW --- 2022-07-28
1579211 Treat minimized windows like unloaded tabs Firefox Session Restore nobody NEW --- 2023-08-04
1583384 Recently closed tabs menu is slow due to giant (several mb) data URIs stored for closed tab favicons Firefox Session Restore nobody NEW --- 2024-05-08
1594368 Query multiple URIs in the parent process at the same time. Toolkit Places nobody NEW --- 2023-09-23
1597318 Find and get rid of XBL sync binding hacks in front-end code Firefox General nobody NEW --- 2023-08-05
1597684 Bookmarks & History: extremely slow back/forward navigation Firefox Bookmarks & History nobody NEW --- 2023-08-04
1603449 Sync layout flush at the end of page load due to poor interaction between reader mode and add-ons Toolkit Reader Mode nobody NEW --- 2022-10-11
1624683 [meta] put browser.xhtml's panels, popupnotification and context menus into html:template tags and only insert them into the DOM for real when needed, to improve startup and window opening performance Toolkit UI Widgets nobody NEW --- 2023-08-04
1626009 Prefs do mainthread IO on all helper apps off disk when they load Firefox Settings UI nobody NEW --- 2024-03-20
1651161 Evaluate what things should move out of _scheduleArbitrarilyLateIdleTasks() Firefox General nobody NEW --- 2022-03-28
1685140 Noticeable UI lag when deleting lots of history entries because TopSitesFeed.refresh is called for every single one Firefox Top Sites nobody NEW --- 2024-04-03
1688073 Showing the bookmarks toolbar (Ctrl+Shift+B) janks the parent process for several seconds when there are many windows Firefox Bookmarks & History nobody NEW --- 2024-03-20
1712338 The history results flicker while typing a keyword used for multiple searches on different websites Firefox Address Bar nobody NEW --- 2023-01-09
1751459 Use a lazy pref getter for the contile prefs in TopSitesFeed.jsm Firefox New Tab Page nobody NEW --- 2024-04-16
1808719 Optimize consumers of slow gBrowser.visibleTabs Firefox Tabbed Browser nobody NEW --- 2023-08-29
1820171 "List all tabs" dropdown still slow with lots of tabs Firefox Tabbed Browser nobody NEW --- 2024-04-30
1889445 The font dialog flickers when it is initially populated Firefox Settings UI nobody NEW --- 2024-04-04
1355459 The last window and the task bar item should disappear immediately on shutdown Firefox General nobody NEW --- 2023-05-15
1358390 1.24ms uninterruptible reflow at useLandscapeMode@chrome://devtools/content/inspector/inspector.js:460:27 DevTools Inspector nobody NEW --- 2023-03-15
1358405 13.97ms uninterruptible reflow at getComputedURL@chrome://browser/content/nsContextMenu.js:979:15 Firefox Menus nobody NEW --- 2023-07-18
1358734 0.93ms uninterruptible reflow at showNavToolbox@chrome://browser/content/browser-fullScreenAndPointerLock.js:576:18 Firefox Toolbars and Customi nobody NEW --- 2023-03-15
1359259 0.92ms uninterruptible reflow at PopupNotifications_showPanel@resource://gre/modules/PopupNotifications.jsm:932:9 Toolkit PopupNotifications a nobody NEW --- 2024-04-25
1359263 2.17ms uninterruptible reflow at receiveMessage@resource://gre/modules/SelectParentHelper.jsm:214:7 Core Layout: Form Control nobody NEW --- 2023-03-15
1362529 0.97ms uninterruptible reflow at @chrome://browser/content/tab-content.js:85:43 Firefox Tabbed Browser nobody NEW --- 2024-04-02
1364290 1.89ms uninterruptible reflow at insertPlaceholder@resource://app/modules/DragPositionManager.jsm:181:7 Firefox Toolbars and Customi nobody NEW --- 2023-03-15
1364324 0.98ms uninterruptible reflow at AreaPositionManager@resource://app/modules/DragPositionManager.jsm:24:23 Firefox Toolbars and Customi nobody NEW --- 2023-07-18
1320534 [meta] Speed and performance of importing bookmarks from JSON or HTML files is awful Firefox Bookmarks & History nobody NEW --- 2023-05-11
1365305 0.86ms uninterruptible reflow at _positionPinnedTabs@chrome://browser/content/tabbrowser.xml:6147:33 Firefox Tabbed Browser nobody NEW --- 2024-03-22
1391282 The menu panel is painted several times when it's opened for the first time Firefox Toolbars and Customi nobody NEW --- 2024-03-22
1421463 The reload button should not be temporarily disabled when loading about:home in a new window Firefox Toolbars and Customi nobody NEW --- 2023-07-18
1432169 Consider firing ViewShowing events before moving the "panelview" node Firefox Toolbars and Customi nobody NEW --- 2023-03-23
1477235 Reduce reflows in autocomplete binding (adjustHeight and potentially handleOverflow?) Toolkit UI Widgets nobody NEW --- 2024-04-16
1478703 Proactively warm up layers for the next (and previous?) tab when user presses ctrl (Win/Lin) or cmd (Mac) Firefox Tabbed Browser nobody NEW --- 2023-09-21
1482734 2.09ms uninterruptible reflow at onxbldragover@chrome://browser/content/tabbrowser.xml:1391:9 Firefox Tabbed Browser nobody NEW --- 2024-03-21
1506962 Try persisting chromemargin and brighttext attributes on browser windows Firefox Tabbed Browser nobody NEW --- 2022-10-11
1516525 Download indicator code should use idle task and/or not load until there are downloads Firefox Downloads Panel nobody NEW --- 2022-10-11
1562490 Deleting large amount of bookmarks and folders hangs/locks/freezes Mozilla Firefox completely for some time Firefox Bookmarks & History nobody NEW --- 2024-02-07
837989 Use IOUtils for gLastOpenDirectory Firefox General nobody NEW --- 2023-05-15
1023152 Preload panel contents on hover of toolbar button Firefox Toolbars and Customi nobody NEW --- 2023-07-18
1350569 Avoid full session history collect for DOMTitleChanged/OnHistoryReload Firefox Session Restore nobody NEW --- 2023-07-18
1505531 Crash report fetching from about:support, and probably about:crashes, is slow due to main thread IO Toolkit Crash Reporting nobody NEW --- 2024-03-20
1605486 Reused selected tab is removed and then re-added to tabstrip when restoring session data including a selected tab Firefox Session Restore nobody NEW --- 2024-03-20
1618129 Very slow session restore (profile included) WebExtensions General nobody NEW --- 2022-10-11
1637024 Implement an "after startup settled" event to defer expensive work Toolkit Startup and Profile nobody NEW --- 2022-04-07
1650250 Slow startup/high CPU use when restoring Firefox session with about:newtab as active tab in all windows Firefox Session Restore nobody NEW --- 2022-04-01
1708802 UITour should not iterate through all browser windows for every closed tab Firefox Tours nobody NEW --- 2022-04-28
1808711 [meta] Optimize operations with lots of tabs Firefox Tabbed Browser nobody NEW --- 2024-06-28
1442694 Pinned tabs populating tab bar create visual noise on startup Firefox Session Restore dothayer REOP --- 2022-10-11
1766434 checkPinCurrentAppToTaskbar is used on the main thread and does blocking I/O Firefox Messaging System brennie RESO FIXE 2022-05-10
1360028 0.99ms uninterruptible reflow at showNotification@chrome://browser/content/browser-addons.js:412:22 WebExtensions Frontend dao+bmo RESO FIXE 2024-03-28
1660568 investigate first-time theme enabling performance in about:welcome and decide what to do Firefox Messaging System nobody RESO WORK 2024-04-03
1620576 UrlbarProviderSearchTips.jsm triggers main thread I/O to updates.xml to fetch the updateCount Firefox Address Bar daisuke RESO FIXE 2024-03-20
1822532 Sync style/layout(?) reflows when closing tabs Firefox Tabbed Browser dao+bmo RESO FIXE 2023-03-30
1752853 Stop using a worker to write session restore information Firefox Session Restore mathew.hodson RESO FIXE 2022-06-27
1289217 Importing large history from Chrome causes Firefox to freeze Firefox Migration nobody RESO WORK 2023-03-15
1353548 Initialization of the devtools menu slows down window opening DevTools General nobody RESO FIXE 2024-05-20
1390928 sendStyleSheetInfo() shows up in profiles during page show Firefox Menus nobody RESO WORK 2023-07-18
1456615 places.sqlite accumulates lots of I/O when browser is idle Toolkit Places nobody RESO DUPL 2023-04-26
1462373 1.39ms uninterruptible reflow at _calculateMaxHeight@resource:///modules/PanelMultiView.jsm:1032:9 Firefox Menus nobody RESO DUPL 2024-03-16
1490946 Modal dialogs in General Preferences show up too slow Firefox Settings UI nobody RESO WORK 2024-04-03
1810739 Telemetry hurts performance of creating lots of tabs Firefox Tabbed Browser brennie RESO FIXE 2023-04-26
1763279 SessionStore keeps copying all data into a huge array Firefox Session Restore gijskruitbosch+bugs RESO FIXE 2023-12-01
1854434 PrivacyLevel should cache its pref Firefox Session Restore gijskruitbosch+bugs RESO FIXE 2023-12-07
1785267 Cache fragments for custom elements Thunderbird Instant Messaging martin RESO FIXE 2023-01-03
1811115 Stop iterating all tabs each time that one is removed Firefox Tabbed Browser nbaumgardner RESO FIXE 2023-06-06
816607 SessionStore closes all tabs one by one, triggering synchronous reflow each time Firefox Session Restore nobody RESO WORK 2023-03-15
1654681 FX_TAB_SWITCH_TOTAL_E10S_MS regression on Windows on 2020-07-01 Firefox Tabbed Browser nobody RESO INCO 2024-03-20
1728909 Pinned tabs created by session restore should get their URL passed with skipLoad: true, instead of not passing a URL Firefox Session Restore nobody RESO FIXE 2024-03-27
1728910 Windows created by session restore, including the initial window, should have URL information Firefox Session Restore nobody RESO DUPL 2022-05-02
1760461 Closing multiple tabs is slow because _setPositionalAttributes() is called for each tab Firefox Tabbed Browser oriol-bugzilla RESO DUPL 2023-06-07
1808661 Remove dead code from _setPositionalAttributes Firefox Tabbed Browser oriol-bugzilla RESO FIXE 2023-01-07
1808721 showTab and hideTab shouldn't invalidate cached _tabs Firefox Tabbed Browser oriol-bugzilla RESO FIXE 2023-01-05
1808726 Avoid gBrowser.visibleTabs in _mouseenter() Firefox Tabbed Browser oriol-bugzilla RESO WORK 2023-01-05
1808787 Optimize drag-and-drop into tabbar with lots of tabs Firefox Tabbed Browser oriol-bugzilla RESO FIXE 2023-03-24
1808965 Stop calling _mouseleave and _mouseenter from _setPositionalAttributes Firefox Tabbed Browser oriol-bugzilla RESO FIXE 2023-01-10
1705215 With "Bookmarks toolbar: only show on new tab", tab-switches to/from a new-tab cause the viewport-height to change (and cause layout/paint jank) **in all background tabs** Firefox Toolbars and Customi dao+bmo VERI FIXE 2024-06-10
131 bugs found.
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