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