-{"bugs":[{"summary":"H3 upload Speed still slow. Three times slower than other browsers.","creation_time":"2023-09-13T10:36:04Z","severity":"S2","last_change_time":"2025-09-22T17:43:02Z","component":"Networking: HTTP","priority":"P1","keywords":["leave-open","perf:responsiveness","reproducible","top50","webcompat:platform-bug"],"id":1852924,"status":"ASSIGNED","op_sys":"Unspecified"},{"op_sys":"All","keywords":[],"status":"ASSIGNED","id":1963814,"component":"Password Manager","priority":"--","creation_time":"2025-05-01T13:52:50Z","summary":"Browser UI hang in sqlite3PagerSharedLock during LoginManagerCrypto decryption (via sqlite usage during NSC_DecryptInit for SDR crypto)","severity":"--","last_change_time":"2025-07-03T16:42:57Z"},{"keywords":["perf:responsiveness"],"status":"NEW","id":1602842,"op_sys":"Unspecified","summary":"OSXDisplay::EnableVsync hangs in CVDisplayLinkCreateWithActiveCGDisplays","creation_time":"2019-12-10T17:22:25Z","last_change_time":"2025-07-01T19:28:26Z","severity":"S3","component":"Widget: Cocoa","priority":"P3"},{"last_change_time":"2025-05-28T19:20:30Z","severity":"S3","creation_time":"2020-11-16T15:30:13Z","summary":"SendReceiveMouseInputEvent often blocks the main thread of the parent process","component":"Panning and Zooming","priority":"--","status":"NEW","id":1677509,"keywords":["perf:responsiveness"],"op_sys":"Unspecified"},{"keywords":["perf:responsiveness"],"status":"NEW","id":1688951,"op_sys":"Windows","creation_time":"2021-01-26T19:14:50Z","summary":"Lazy font loading can still hang the main thread on Windows","last_change_time":"2025-08-22T20:22:21Z","severity":"S3","component":"Layout: Text and Fonts","priority":"--"},{"creation_time":"2021-01-28T16:03:57Z","summary":"[Meta] investigate performance issues on Reddit.","severity":"--","last_change_time":"2025-03-11T08:41:57Z","priority":"--","component":"Performance: General","keywords":["meta"],"id":1689392,"status":"NEW","op_sys":"Unspecified"},{"op_sys":"Unspecified","keywords":["perf:resource-use","reproducible"],"status":"NEW","id":1771179,"component":"Web Audio","priority":"P2","summary":"AudioContext power optimizations","creation_time":"2022-05-25T16:56:04Z","last_change_time":"2025-09-17T01:08:29Z","severity":"S3"},{"creation_time":"2022-08-31T21:19:22Z","summary":"Fenix hangs and memory usage jumps on theguardian.com when opening headlines in new tab","last_change_time":"2025-03-10T23:42:15Z","severity":"S2","component":"Performance","priority":"P2","keywords":["perf:resource-use","perf:responsiveness","reproducible"],"status":"NEW","id":1788530,"op_sys":"Unspecified"},{"severity":"S3","last_change_time":"2025-10-30T20:58:10Z","summary":"CSS filter() with invert() and hue-rotate() results in sluggish scrolling on Wikipedia","creation_time":"2023-04-05T14:45:37Z","component":"Graphics: WebRender","priority":"--","id":1826576,"status":"NEW","keywords":["webcompat:platform-bug"],"op_sys":"Android"},{"severity":"S3","last_change_time":"2025-10-13T08:56:16Z","summary":"Firefox regularly hangs for over half a second in SessionWriter.sys.mjs calling IOUtils.writeJSON serializing a massive JS object when saving tab state","creation_time":"2023-08-18T17:52:57Z","component":"Session Restore","priority":"P3","id":1849393,"status":"NEW","keywords":["perf","perf:responsiveness"],"op_sys":"Unspecified"},{"keywords":[],"id":1903530,"status":"NEW","op_sys":"Unspecified","summary":"Frequent long janks on Android on loading certain pages","creation_time":"2024-06-19T11:50:31Z","severity":"S2","last_change_time":"2025-11-05T15:23:53Z","priority":"P2","component":"Storage: Quota Manager"},{"priority":"P2","component":"Site Reports","summary":"vizzy.io - The browser is slowed down and eventually stops responding","creation_time":"2024-11-04T09:34:27Z","severity":"S2","last_change_time":"2025-03-20T03:11:36Z","op_sys":"Windows 10","keywords":["webcompat:needs-contact","webcompat:site-report"],"status":"NEW","id":1928948},{"creation_time":"2025-04-30T12:23:32Z","summary":"ChatGPT on clean Firefox install - \"This page is slowing down Firefox.\"","severity":"S2","last_change_time":"2025-11-21T22:45:42Z","priority":"P1","component":"JavaScript Engine","keywords":[],"id":1963578,"status":"NEW","op_sys":"Unspecified"},{"status":"NEW","id":1971873,"keywords":["perf:pageload"],"op_sys":"Android","severity":"S3","last_change_time":"2025-07-04T18:23:19Z","summary":"m.facebook.com live site loads 100-200ms slower in Fenix than Chrome","creation_time":"2025-06-12T19:54:27Z","priority":"P3","component":"Performance: Navigation"},{"keywords":[],"id":1995805,"status":"NEW","op_sys":"Unspecified","creation_time":"2025-10-22T15:48:12Z","summary":"Fenix cold start applink navigation performance ~1500ms slower than warm, hot scenarios, p75","last_change_time":"2025-11-19T22:29:16Z","severity":"S2","component":"Performance Engineering","priority":"P3"},{"id":1550754,"status":"REOPENED","keywords":["perf:responsiveness","perf:startup","reproducible"],"op_sys":"Unspecified","last_change_time":"2025-07-01T14:09:09Z","severity":"S3","creation_time":"2019-05-10T14:52:25Z","summary":"ContentParent::KillHard janks the main thread","component":"Crash Reporting","priority":"--"}]}
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