Stream / media player broken under Firefox

[RinCat]

Checklist

• I have updated to the latest available Home Assistant version.
• I have cleared the cache of my browser.
• I have tried a different browser to see if it is related to my browser.
• I have tried reproducing the issue in safe mode to rule out problems with unsupported custom resources.

Describe the issue you are experiencing

I noticed under HA 2025.1 and 2025.2, my Firefox unable to play camera stream.
The preview image generated correctly.
There is no error from HA system or web console.
The m3u8 loading and m4s file download / update just fine, I can see them keep download new files.
But the player video keep loading forever.

On my android phone before I click update when it shows new version available, the video is playable, but stop working after update. (Default Firefox not Chrome)

But the player works under Chrome.

Describe the behavior you expected

The video should playable under Firefox.

Steps to reproduce the issue

N/A

What version of Home Assistant Core has the issue?

2025.2.1

What was the last working version of Home Assistant Core?

2024.X

In which browser are you experiencing the issue?

Firefox 135.0

Which operating system are you using to run this browser?

Linux

State of relevant entities

Problem-relevant frontend configuration

Javascript errors shown in your browser console/inspector

Additional information

HA Frontend 20250205.0

[metronidazole]

I think this is a known limitation https://www.home-assistant.io/integrations/stream/

Admitted it's HA's fault because they are using Apple's proprietary HLS tech to allow for streaming of the cameras, and this is only supported on Safari and Edge (? with extension)