How about screenshots showing the issue? Links to the pages not working for you would also be helpful. Let me go try one.

Yes, even in troubleshoot mode it stops playing for me, but works fine in Chromium. see screenshot Also test with Waterfox and it works.

Operating System: openSUSE Tumbleweed 20250916 KDE Plasma Version: 6.4.5 KDE Frameworks Version: 6.18.0 Qt Version: 6.9.2 Kernel Version: 6.16.7-1-default (64-bit) Graphics Platform: X11 Processors: 16 × AMD Ryzen 7 5825U with Radeon Graphics Memory: 64 GiB of RAM (62.1 GiB usable) Graphics Processor: AMD Radeon Graphics Manufacturer: HP Product Name: HP ProBook 455 15.6 inch G9 Notebook PC

It works it Microsoft Edge but not FireFox. I would like to choose my browser.

I reported the issue. https://webcompat.com/issues/178799