Performance/Triage/Queries/General

Untriaged

Full Query

ID	Summary	Status
1688959	Main thread hangs in SendFlushRendering if WebRender is busy	NEW
1771902	Compositor CSS animations are not paused in fully occluded windows	NEW
1777875	Lenovo Privacy Guard with "Enable this feature when typing passwords" causing excessive UI responsiveness delays (jank)	NEW
1880287	tiktok.com - Live videos stop working after a few minutes, stuck loading	NEW
1931717	[meta] High OOM rate and CC time in YouTube	NEW
1939354	RAM too much	UNCONFIRMED
1940667	30s of jank on parent-process doing something around getFixupURIInfo and ContentAreaDropListener.sys.mjs (resource://gre/modules/URIFixup.sys.mjs:278:18)	NEW
1941608	Explore AvlTree improvements	NEW
1941716	On a fresh profile, Negative heap-unclassified on "My Bugs" query on b.m.o	NEW
1942031	Bad canvas performance on this example (nokiadesignarchive.aalto.fi)	NEW
1943419	Fluidd memory leak	UNCONFIRMED
1943503	High CPU usage on Debian x64 bookworm (VMware player guest)	UNCONFIRMED
1943841	(With Ublock or "Snap links plus addon") Testcase generating 1000 iframes is 3.3x slower in Nightly and gets superlinearly slower with increase in number of iframes, uses more RAM, and memory doesnt get released fully if you reload the page	NEW
1945665	airbnb.com - Attempting to enter a destination in the search by using the gboard causes the gboard to become unresponsive	NEW
1946248	Too much time spent in gfxMacPlatformFontList::DeprecatedFamilyIsAvailable during startup	NEW
1946913	Consume too much memory	UNCONFIRMED
1949252	Meta Messenger causing high CPU load	UNCONFIRMED
1950073	www.kiwico.com - Checkout page becomes unresponsive	NEW
1950901	Testcase generating N=5K forms (using credential mgmt API?) takes 30s in parent-process and 50s in content process. Chrome takes 9s.	NEW
1955077	Firefox freezes and cause Windows hang when access certain websites	UNCONFIRMED
1955509	Constant CPU usage while idle on the Tiki.org website front page	UNCONFIRMED
1956850	Ublock Origin increases the time to load a simple demo by 4x and uses ~3x more RAM (time spent in wrappercache, proxy, xraywrapper, minorGC and related stuff)	NEW
1957692	Testcase generating N=500 forms and submitting them takes 27s in both parent and content processes,and is 675x slower than Chrome (Part2 of bug 1950901)	NEW
1958480	x.com - High battery drain	NEW
1958712	Testcase generating N <META> elements is 20x slower than Chrome and does weird stuff in Compositor and SceneBuilder (PAPZCTreeManager::Msg_UpdateZoomConstraints)	NEW
1959837	openstreetmap iD editor - slow zooming	NEW
1964374	x.com - Scroll lagging after performing a subsequent query	NEW
1965718	Google Maps framedrops when I'm panning the map	UNCONFIRMED
1966492	JS isn't minified in Fenix release builds	NEW
1967143	firefox taking too much memory	UNCONFIRMED
1967585	Excessive memory allocation when toolbar icons are updated (e.g., during downloads or extension changes) — sometimes triggers OOM killer	UNCONFIRMED
1972941	[Linux] File downloading is CPU-intensive	NEW
1975272	Animated newtab background images consume CPU even when not in the foreground	NEW
1975348	EspnCricInfo site creates massive CPU and Memory usage FF140.0.2	UNCONFIRMED
1978576	www.kimi.com - Firefox is slower compared to Chrome	NEW
1982980	Memory leak in Firefox on Android when repeatedly appending and removing an iframe	UNCONFIRMED
1987540	Tab crash/freezes shortly after going fullscreen on a youtube stream	UNCONFIRMED
1988312	www.pexels.com - Stuttering/choppy scroll	NEW
1988375	RAM ussage very very high	UNCONFIRMED
1988605	Facebook search bar animation stutters on Firefox	UNCONFIRMED
1988776	MutationObserver's getReceiverFor is slow when there are a lot of observers	NEW
1991381	www.notebooksbilliger.de - The page does not instantly load	NEW
1991890	getdione.app - Scrolling is laggy	NEW
1993424	The list of open tabs is very slow to update and firefox UI hangs when I close just one	NEW

44 Total; 44 Open (100%); 0 Resolved (0%); 0 Verified (0%);

Awaiting response to needinfo

Full Query

ID	Summary	Status
1882916	Firefox consumes a lot of CPU and makes me Mac M2 hang for a good 15 seconds	UNCONFIRMED
1961523	Firefox constantly freezes	UNCONFIRMED
1963933	Google search results in high CPU usage and spike in temps. Happens with most of the browsers but Firefox results in higher temps spikes and CPU usage	UNCONFIRMED
1981274	utter-disappointment-with-firefox-performance	UNCONFIRMED
1982631	Google Maps takes forever to load	UNCONFIRMED

5 Total; 5 Open (100%); 0 Resolved (0%); 0 Verified (0%);

Recently opened bugs with performance keywords in the summary

Full Query

ID	Summary	Status
1990856	ANR: GPU fence hang (UI thread in accessibility/graphics allocation, worker blocked on session storage I/O)	NEW
1990941	[Tests] Add additional macOS GPU process sandbox tests	NEW
1990992	Migrate Android performance tests to use AAB+bundletool instead of APK	NEW
1991133	Add Translations RemoteSettings Cleanup Functionality	NEW
1991266	Step 12.6 of #performing-a-navigation-api-traversal isn't performed	NEW
1991281	Slower and slower response facebook message	UNCONFIRMED
1991358	Stop performing JS::FinishCollectingDelazifications/JS::AbortCollectingDelazifications from cache-related code path	REOPENED
1991429	5.53 - 5.32% perf_reftest_singletons nth-index-1.html / perf_reftest_singletons nth-index-2.html (Linux) regression on Tue September 16 2025	NEW
1991439	TranslationsEngine timeout may destroy engine during active translation	NEW
1991531	Consider adding a shell version of performance.mark and performance.measure	NEW
1991667	Firefox performance and usability degrades until system restart on Linux	UNCONFIRMED
1991830	sidebar is too slow, stays visible too shortly and expands when the mouse cursor has not touched it	UNCONFIRMED
1991838	Freed PHC slots are counted towards its memory limit when they don't consume physical memory	NEW
1992066	Brandon Jones' `metaballs` demo for WebGPU fails to run on Intel Macs	NEW
1992180	LNA remember this decision text is not translated in AR build	NEW
1992205	Weird corner on slack dark mode due to "hidden" resizer input	NEW
1992212	Enable WebGPU by default for MacOS Tahoe on ARM architecture	ASSIGNED
1992230	Display Translation Error Message in about:translations	NEW
1992231	Display Unsupported Detected Language Info Message in about:translations	NEW
1992232	Implement about:translations Copy Button	NEW
1992233	Imlement about:translations Clear Button	NEW
1992234	Add Usage Telemetry to about:translations	NEW
1992484	Investigate removing some services from the content sandbox when GPU process enabled	NEW
1992488	WebGPU hangs on macOS when executing `webgpu:api,validation,image_copy,layout_related:required_bytes_in_copy:method="CopyB2T";format="bc2-rgba-unorm-srgb";dimension="3d"`	NEW
1992531	Switching between tabs with the tab list feels slow and not-responsive due to the tap being ignored after the slide	NEW
1992558	Wasm64 high memory usage/memory leak on Windows prevents running Emscripten 'browser64_4gb' suite to completion	ASSIGNED
1992567	Memory leak while screen sharing	UNCONFIRMED
1992579	Memory leak with F1TV	UNCONFIRMED
1992582	Unity's WebGPU backend unable to run because bind groups and layouts are not `null`able	UNCONFIRMED
1992608	[Graphics] Fullscreen flicker/blackout on AMD (AMDGPU) after gmp-openh264 plugin update	UNCONFIRMED
1992654	WebGPU black canvas on Linux Mint X11 with RadV and Radeon RX 9070 XT	UNCONFIRMED
1992771	WebGPU: Bind groups and layouts should be `null`able, but are not	NEW
1992779	Measure CPU and memory usage for inference engine runs in telemetry	NEW
1992835	Ensure GPU process launch failure before IPDL is retried on Android	NEW
1992857	GPUProcessManager::EnsureGPUReady should try failing if backgrounded on Android	ASSIGNED
1992891	Make sure we always allow software in the GPU process on non-Windows	ASSIGNED
1993036	WebGPU should report Direct3D shader model in about:support and crash reports	NEW
1993123	Let macOS GPU process on-by-default ride the trains	NEW
1993137	Mac GPU process: crash on time zone change	NEW
1993183	WeakMap memory is not correctly accounted for during sweeping	NEW
1993207	Speed up fastText WASM by building without exception support	NEW
1993212	Investigate allocating WeakMap memory with the buffer allocator	NEW
1993229	31.74 - 2.89% Heap Unclassified / Resident Memory + 2 more (OSX, Windows) regression on Tue September 30 2025	NEW
1993246	Very long jank during GC/CC (ghost windows?)	UNCONFIRMED
1993256	[composable toolbar] Keyboard not triggered after performing a voice search on Google Pixel 3 XL (Android 9)	NEW
1993258	macOS GPU process ignores user font smoothing setting	NEW
1993321	macOS GPU process: Make sure parent endpoint is bound before child endpoint is sent	ASSIGNED
1993333	https://huggingface.co/spaces/ibm-granite/granite-docling-258M-WebGPU is a lot slower in Firefox than Chrome and Safari	NEW
1993341	Enable WebGPU on older MacOS versions	NEW
1993381	Firefox hangs when starting within virtual machine with macOS GPU process enabled	NEW
1993383	Frozen tab contents after GPU process crash on macOS, until browser UI repaints	ASSIGNED

51 Total; 51 Open (100%); 0 Resolved (0%); 0 Verified (0%);