Firefox Support Forum

Hello,

Firefox YouTube HDR mode works in Full Screen Mode (FSM), Picture in Picture (PiP), but not in normal Windowed mode (WiM). This bug appeared in around Q3-Q4 2023, before that the YouTube HDR mode was available in FSM, PiP and WiM mode.

In Safari the YouTube HDR content works in FSM, PiP and WiM mode.

Firefox 115.7.0esr (64-bit) macOS Sonoma 14.3 ( I updated the system from macOS 13 in the last 2 weeks ) MacBook Pro 14", 2021 w/ Apple M1 Pro (1000 nits sustained full screen, 1600 nits peak)

This issue exists in all HDR videos what I tested on YouTube.

Video ID / sCPN DNL0IDYKzZs / R0TW 6WC7 574W Viewport / Frames 958x539*2.00 / 1 dropped of 1912 Current / Optimal Res 1920x1080@30 / 1920x1080@30 Volume / Normalized 100% / 100% (content loudness -7.1dB) Codecs vp09.02.51.10.01.09.18.09.00 (335) / opus (251) Color arib-std-b67 (HLG) / bt2020 Connection Speed 13936 Kbps Network Activity 0 KB Buffer Health 41.00 s Mystery Text s:4 t:1039.96 b:972.800-1080.966 P L pbs:3824 Date Fri Feb 02 2024 08:17:38 GMT+0100 (Central European Standard Time)

Dear Sir,

Shahid MBC was working perfect before couple of weeks ago

you can check from this link

https://shahid.mbc.net/en/player/episodes/Tamer-Wa-Shawqiyya-season-1-episode-1/id-1011829

Now there is some sort of an error message of HTML5 video

When I clicked troubleshooting mode FF unexpectedly closed my Private browsing session and all the tabs. How do I reopen them?

I did not expect FF to close on me like that. I thought that as I was in a private browsing session FF would have warned me that it was about to close had it been necessary.

I'm guessing that my open tabs have been lost permanently because you didn't warn me and that all that time I spent is now wasted.

Life is really simple except that other people make it problematic.

Om Macos 12.7.3 Monterey using FF 115.7.0esr (64-bit). Been using FF since God knows when. All well. But a couple of months ago windows or tabs are crashing. When I'm hitting a link and either holding Cmnd or right click "open in new tab" in order to get the linked page in new tab, the tab/window I'm using shuts down. Poof.

For the longest time (can't pinpoint when it started) I've been having issues with Firefox on desktop (Macbook) playing videos and occasionally audio. Video playback will be functioning fine, then there seems to be a "trigger"...For ex. I have noticed this is often me trying to play a Twitter video, which won't play normally, and suddenly NO video playback of any kind (and sometimes audio) will work...Youtube, Netflix, you name it.

The only thing that "fixes" the issue (until it pops up again the next time) is quitting Firefox and starting it back up again, usually clearing my cache first for good measure. I have tried disabling all extensions and it has no effect. I have tried playing the video in a private window/incognito—no effect. If I open up Chrome and try to play the same videos I have absolutely no issues.

My Firefox says it is currently up to date, though I am running an older version iOS (Mojave). I have googled and seen many other people having this issue but haven't seen anyone chime in with a fix that actually works. Any ideas?