polywock
「Bug」Firefox浏览器使用快捷键出现音画不同步
Firefox浏览器使用快捷键时，出现音画不同步问题，测试环境为Windows11 23H2，浏览器为Zen1.12.1b（ Firefox 138.1 ）。 在播放bilibili网页视频时，使用globalspeed快捷键“前进10秒”和“后退五秒”出现了音频和画面不同步问题，经常是画面已经切换但音频一直延迟，且无论是否倍速播放都一样，我关闭了我所有其他扩展，确认问题出在globalspeed和Firefox的兼容性上，但在播放时使用“←”和“→”进行跳过就不会出现这样的问题。
There is a synchronization issue between audio and video when using shortcuts in Firefox browser. The testing environment is Windows 11 23H2, the browser is Zen1.12.1b (Firefox 138.1). When playing bilibili web videos, using the globalspeed shortcut "10 seconds forward" and "five seconds back" caused the audio and picture to not sync up. Often the picture has been switched but the audio is always latency, and it is the same whether it is played at double speed or not. I closed all my other extensions to confirm that the problem is the compatibility of globalspeed and Firefox. However, skipping with "←" and "→" during playback will not cause such problems.
Might be a browser bug. Global Speed just updates the video's currentTime by +10 seconds. Is fast seek enabled for the seek shortcut? If not, is the issue worse with fast seek enabled?
Interesting，I closed fast seek and it works! The same video in bilibili synced up. Though this operate would indeedly slow down the control, but it works.
In that case, I'll disable fast seeking in the next update. Seems like a Firefox/Zen bug.
Maybe you can ask other Firefox users to try it out, after all, this might be my individual problem.
I was able to reproduce the issue on Firefox 139.0 (Mac) with fast seek (not specific to Bilibili, bug also happens on Youtube).
If you want, you can report the issue. -> https://bugzilla.mozilla.org/home