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