-{"bugs":[{"op_sys":"Unspecified","summary":"H3 upload Speed still slow. Three times slower than other browsers.","priority":"P1","last_change_time":"2025-09-22T17:43:02Z","id":1852924,"status":"ASSIGNED","creation_time":"2023-09-13T10:36:04Z","keywords":["leave-open","perf:responsiveness","reproducible","top50","webcompat:platform-bug"],"component":"Networking: HTTP","severity":"S2"},{"creation_time":"2025-05-01T13:52:50Z","status":"ASSIGNED","id":1963814,"last_change_time":"2025-07-03T16:42:57Z","priority":"--","op_sys":"All","summary":"Browser UI hang in sqlite3PagerSharedLock during LoginManagerCrypto decryption (via sqlite usage during NSC_DecryptInit for SDR crypto)","severity":"--","component":"Password Manager","keywords":[]},{"component":"Widget: Cocoa","keywords":["perf:responsiveness"],"severity":"S3","last_change_time":"2025-07-01T19:28:26Z","priority":"P3","op_sys":"Unspecified","summary":"OSXDisplay::EnableVsync hangs in CVDisplayLinkCreateWithActiveCGDisplays","creation_time":"2019-12-10T17:22:25Z","status":"NEW","id":1602842},{"id":1677509,"status":"NEW","creation_time":"2020-11-16T15:30:13Z","summary":"SendReceiveMouseInputEvent often blocks the main thread of the parent process","op_sys":"Unspecified","priority":"--","last_change_time":"2025-05-28T19:20:30Z","severity":"S3","keywords":["perf:responsiveness"],"component":"Panning and Zooming"},{"severity":"S3","keywords":["perf:responsiveness"],"component":"Layout: Text and Fonts","id":1688951,"creation_time":"2021-01-26T19:14:50Z","status":"NEW","priority":"--","summary":"Lazy font loading can still hang the main thread on Windows","op_sys":"Windows","last_change_time":"2025-08-22T20:22:21Z"},{"priority":"--","op_sys":"Unspecified","summary":"[Meta] investigate performance issues on Reddit.","last_change_time":"2025-03-11T08:41:57Z","id":1689392,"creation_time":"2021-01-28T16:03:57Z","status":"NEW","keywords":["meta"],"component":"Performance: General","severity":"--"},{"last_change_time":"2025-11-26T06:43:39Z","op_sys":"Unspecified","summary":"AudioContext power optimizations","priority":"P2","status":"NEW","creation_time":"2022-05-25T16:56:04Z","id":1771179,"component":"Web Audio","keywords":["perf:resource-use","reproducible"],"severity":"S3"},{"id":1788530,"creation_time":"2022-08-31T21:19:22Z","status":"NEW","priority":"P2","summary":"Fenix hangs and memory usage jumps on theguardian.com when opening headlines in new tab","op_sys":"Unspecified","last_change_time":"2025-03-10T23:42:15Z","severity":"S2","keywords":["perf:resource-use","perf:responsiveness","reproducible"],"component":"Performance"},{"keywords":["webcompat:platform-bug"],"component":"Graphics: WebRender","severity":"S3","op_sys":"Android","summary":"CSS filter() with invert() and hue-rotate() results in sluggish scrolling on Wikipedia","priority":"--","last_change_time":"2025-10-30T20:58:10Z","id":1826576,"status":"NEW","creation_time":"2023-04-05T14:45:37Z"},{"component":"Session Restore","keywords":["perf","perf:responsiveness"],"severity":"S3","last_change_time":"2026-01-22T10:13:09Z","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","priority":"P3","status":"NEW","creation_time":"2023-08-18T17:52:57Z","id":1849393},{"id":1903530,"status":"NEW","creation_time":"2024-06-19T11:50:31Z","summary":"Frequent long janks on Android on loading certain pages","op_sys":"Unspecified","priority":"P2","last_change_time":"2026-01-15T09:31:44Z","severity":"S2","keywords":[],"component":"Storage: Quota Manager"},{"severity":"S2","keywords":["webcompat:needs-contact","webcompat:site-report"],"component":"Site Reports","id":1928948,"creation_time":"2024-11-04T09:34:27Z","status":"NEW","priority":"P2","summary":"vizzy.io - The browser is slowed down and eventually stops responding","op_sys":"Windows 10","last_change_time":"2025-03-20T03:11:36Z"},{"status":"NEW","creation_time":"2025-04-30T12:23:32Z","id":1963578,"last_change_time":"2026-01-17T03:13:53Z","op_sys":"Unspecified","summary":"ChatGPT on clean Firefox install - \"This page is slowing down Firefox.\"","priority":"P1","severity":"S2","component":"JavaScript Engine","keywords":[]},{"severity":"S3","keywords":["perf:pageload"],"component":"Performance: Navigation","id":1971873,"status":"NEW","creation_time":"2025-06-12T19:54:27Z","summary":"m.facebook.com live site loads 100-200ms slower in Fenix than Chrome","op_sys":"Android","priority":"P3","last_change_time":"2025-07-04T18:23:19Z"},{"priority":"--","op_sys":"Android","summary":"Slow scrolling performance on particular sites (mastodon)","last_change_time":"2026-01-23T20:06:23Z","id":1988762,"creation_time":"2025-09-16T14:51:59Z","status":"NEW","keywords":["stalled"],"component":"Graphics: WebRender","severity":"S2"},{"severity":"S2","keywords":[],"component":"Performance Engineering","id":1995805,"creation_time":"2025-10-22T15:48:12Z","status":"NEW","priority":"P3","summary":"Fenix cold start applink navigation performance ~1500ms slower than warm, hot scenarios, p75","op_sys":"Unspecified","last_change_time":"2025-11-19T22:29:16Z"},{"last_change_time":"2025-07-01T14:09:09Z","priority":"--","summary":"ContentParent::KillHard janks the main thread","op_sys":"Unspecified","creation_time":"2019-05-10T14:52:25Z","status":"REOPENED","id":1550754,"component":"Crash Reporting","keywords":["perf:responsiveness","perf:startup","reproducible"],"severity":"S3"}]}
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