Performance/Triage/Queries/General

Untriaged

Full Query

ID	Summary	Status
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
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
1982980	Memory leak in Firefox on Android when repeatedly appending and removing an iframe	UNCONFIRMED
1988312	www.pexels.com - Stuttering/choppy scroll	NEW
1988605	Facebook search bar animation stutters on Firefox	UNCONFIRMED
1988608	Tabs in Firefox refresh when multitasking	UNCONFIRMED
1988762	Slow scrolling performance on particular sites (mastodon)	NEW
1988776	MutationObserver's getReceiverFor is slow when there are a lot of observers	NEW
1993778	Got a new Mac (new to the OS) and noticed only with Firefox does battery drain rapidly, used Firefox Profiler (below) to see if anything stuck out but didn't see anything, any help appreciated	UNCONFIRMED
1994431	Firefox is nearly unusable on a busy system (pages won't load if CPU is used heavily)	UNCONFIRMED
1994817	Firefox CPU usage spikes to 100%+ on some sites, particularly when opening new tabs	UNCONFIRMED
1996484	https://www.rmcbfmplay.com/	UNCONFIRMED
1997359	Firefox hangs on Mac Apple M4 Pro OS Tahoe 26.0.1	NEW
1997618	Websites will not load in Firefox while same page will load in Safari/Chrome	UNCONFIRMED

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

Awaiting response to needinfo

Full Query

ID	Summary	Status
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

4 Total; 4 Open (100%); 0 Resolved (0%); 0 Verified (0%);

Recently opened bugs with performance keywords in the summary

Full Query

ID	Summary	Status
1996416	The scroll speed of drag selection in full-screen mode is slower than in Chrome.	NEW
1996433	Driver timeout after going fullscreen on YouTube with AMD RX 9000 series GPU	UNCONFIRMED
1996454	Failed to launch GPU process, fallback to software renderer	UNCONFIRMED
1996460	Slow interactive demo on https://en.wikipedia.org/wiki/Breeder_(cellular_automaton)	NEW
1996472	vaapi media playback choppy with conservative cpu governor	UNCONFIRMED
1996503	Allocate hardware decoder in GPU process if GPU process exists on Android	NEW
1996589	translation: saving the *translated* DOM	NEW
1996632	Remove (activity as HomeActivity) casts in TranslationsDialogFragment	ASSIGNED
1996653	Mac GPU process: Crash in [@ IPCError-browser | GPUProcessKill]	NEW
1996681	Remove old translations C++ DOM code	NEW
1996690	Adjust Firefox backup layout to support locales with longer translations	NEW
1996755	Crash with making render context current when restoring windows on AMD GPU on Linux	NEW
1996818	Switch the TextureCache to using GpuBufferF instead of GpuCache	NEW
1996989	Reduce memory usage for alloc sites in ICScript	NEW
1997177	Gather CPU and memory information specifically for the inference process without requestProcInfo	NEW
1997202	Performance for <https://lumen-decor-studio.vercel.app/> is significantly worse than on Chrome	NEW
1997247	Firefox trackpad scrolling speed is insanely too fast and unlike all other browsers	UNCONFIRMED
1997269	m.gsmarena.com - Part of the text is displayed overlapped when translating the page to Turkish	NEW
1997380	Improve querySelector performance during *-Complex-DOM tests in Speedometer3	NEW
1997510	Video decoder performance issue	UNCONFIRMED
1997529	Testcase using idlecallbacks, callbacks and microtasks is 10x slower than Chrome. Firefox spends time in linkedlist, Chrome seems to use hash.	NEW
1997674	Firefox touchscreen scrolling speed is insanely too fast and unlike all other browsers	NEW
1997704	WebGPU crash on resize on Linux	UNCONFIRMED
1997711	Incorrect direction of translation of one word in PDF	NEW
1997723	[wpt-sync] Sync PR 55799 - Add variant: exclude PerformanceEventTiming.targetSelector	REOPENED
1997786	Janky page transition animations on https://www.microsoft.com/ro-ro/edge/welcome?form=MT00LJ&cs=578062562	UNCONFIRMED
1997806	Tab loading animation consumes extremely high GPU/CPU	UNCONFIRMED
1997833	BaseAlloc does not release memory	NEW
1997835	Pasting 1MB of text on the "To" field of gmail spends 38 seconds in js. Chrome is much faster.	NEW
1997870	Perform bytecode encoding and compression off main thread	ASSIGNED
1997915	A third party app taking ownership of the clipboard and being slow to repond may hang the async clipboard	NEW
1997949	Add a test for Fenix DoH performance during concurrent DNS resolutions and HTTP requests	NEW
1997973	Potential performance improvement by reducing string hashing in nsHttpConnectionMgr::FindCoalescableConnection	NEW
1997983	Observation: Fenix DoH opt-in clients experience slower app link navigations: ~300–1500 ms higher (P75)	NEW
1998018	Elements using very large transform: translateY() values (> 8.9 millions of pixels) disappear in Firefox	NEW
1998021	Migrate Translation UI to M3 Acorn colors	ASSIGNED
1998048	Adaptive Performance - Phase 1 Pref Updates	NEW
1998052	Update WGPU to upstream 690d4ee0 (week of 2025-11-03)	ASSIGNED
1998108	SVG SMIL causes memory leak on Intel Graphics	UNCONFIRMED
1998191	Create a PageExtractor viewer to debug how it's performing	NEW
1998220	Investigate and resolve data inconsistency for perf_startup_cold_main_app_to_first_frame metric	NEW
1998242	Perform subtree name calculation in parent process	ASSIGNED
1998255	Perform subtree label calculation in parent process	NEW
1998256	[toolbar redesign] Share and Translate action in toolbar are missing	ASSIGNED
1998334	[Bug] Firefox DoH unexpectedly falls back to plain DNS when system proxy is set via kioslaverc in KDE	UNCONFIRMED
1998370	Loading an XML document with a supported XHTML doctype is 40x-50x slower than Safari and Chrome	NEW
1998451	Improve performance of codegen tests	ASSIGNED
1998488	[wpt-sync] Sync PR 55856 - [SVG] Fix precision loss in non-scaling-stroke with large coordinate translations	NEW
1998573	Tab shrink animation is janky and leaves behind "ghost" of full-size tab	NEW
1998648	Use in-memory dirty flag and last write time to save origin metadata sometimes	NEW
1998691	Hit MOZ_CRASH(TextureView[Id(1,3)] does not exist) at /third_party/rust/wgpu-core/src/storage.rs:133	NEW
1998768	Memory leak when Firefox kept running	UNCONFIRMED
1998839	Let zero copy video of hardware decoded video with AMD GPUs ride the trains	NEW
1998925	Add dirty flag to the in-memory script cache for WebExtensions usage	NEW

54 Total; 54 Open (100%); 0 Resolved (0%); 0 Verified (0%);