Firefox Community Forum

Since Flathub list the org.mozilla.firefox app as official, i hope this is the correct support channel.

Recently i switched from distro specific package managers to flatpak as my application provider. The firefox flatpak won't play most embedded Video/Media on applications like in-browser fediverse clients, forums, blogs or wikis. Youtube works without any issues, Twitch is fine until there is an adbreak. Then it sometimes stops with the supported format/mime error (screenshot appended), only recoverable by cache-dismissive reload.

I used this Article https://support.mozilla.org/en-US/kb/audio-and-video-firefox and the links it contains to debug without any success. None of these samples play. just shows supported format/mime error https://test-videos.co.uk/bigbuckbunny/mp4-h265 At this test website 1. and 3. example won't play. I provided a screenshot before and after trying to click play on all the examples. https://www.tekeye.uk/html/html5-video-test-page

Contrary to the observed behavior about:support#media claims Software Decoding supported for everything except HEVC.

Chromium Flatpak has no such issues. So i copy the video url and play it with chromium. You can see: dire times.

As the title says. I get this prompt on videos from different, yet particular websites and sources. And they fail to load. It's also happened where some video's work and some don't, side-by-side on the same website and session.

• I've tried clearing all of my cached data, my browser history, cookies, site-data, settings, and fill-out information. No avail.
• I've tried disabling all of my extensions and add-ons.
• I've even tried using google instead, but I just get constant loading on those particular video's with no thumbnail (As depicted in second picture).
• I've checked my video drivers for updates.
• I've tried reinstalling Adobe Flash Player, even though it says it's no longer supported.

Since it also might be happening in another browser. I understand how this might not be Firefox's fault. But I'm hoping you'll be able to help me still.

Good morning from germany,

I am a multiple year subscriber and wanted to watch game 6 before going to work (it is around 6 am over here) but the player isn´t running and it states that games can not be played, even the recap doesn´t start. Other videos are running as on youtube and other social networks. I switched a VPN from location germany to location USA to off but nothing works. I am using the newest version of mozilla firefox.

Can you give me some help what I can watch in order to watch the last two Finals games as well?

Thx guys

https://baynews9.com/fl/tampa/weather/radar Firefox does not play video link but Brave does this link. Problem about a month old.

I am feeding my radio station into my computer, but when i bring the station up on a computer is is a page with my station on it and click on the play button it plays your music instead of my station. How do i fix that?

I had a new computer installed. The output from the speakers is almost inaudible in Firefox, but it's better on other browsers. The tech said that it's a Firefox issue, not a speaker issue--she said the speakers are OK.

Only on firefox, the music on apple music keeps changing volume. I can hear it sound fine for a second but then it changes the volume to around half of what its meant to be. I dont see any settings to change it, its fine on other browsers, im genuinely unsure of what to do.