So what is this twitter stream your talking about? Without a URL so others can verify with their Firefox version to identify if there is a Browser or Twitter login issue causing this.

I'm referring to all video links in posts by twitter users. Regardless of the source URL (YouTube, Vimeo, Twitter, Tik Tok, etc.) When the video from any video platform is directly clicked on in a Twitter thread by a reader, and it is running in the Twitter thread itself, the video almost always hangs while the audio continues running in FireFox. But I can log in to my same account on Chrome and in the same scenarios the videos run smoothly.

My system is:

Windows 7 Pro, Service Pack 1 Intel Core2 CPU 4300 @ 1.80 GHz Intel G965 Express Chipset Family 6GB RAM 64 Bit OS

I don't have a twitter account so it would be helpful if you provide examples of the issue.

Operating System: openSUSE Tumbleweed 20221121 KDE Plasma Version: 5.26.3 KDE Frameworks Version: 5.100.0 Qt Version: 5.15.7 Kernel Version: 6.0.8-1-default (64-bit) Graphics Platform: X11 Processors: 16 × AMD Ryzen 7 5825U with Radeon Graphics Memory: 62.1 GiB of RAM Graphics Processor: AMD Radeon Graphics Manufacturer: HP Product Name: HP ProBook 455 15.6 inch G9 Notebook PC

I can't really show you an example because it happens in real time during video streaming and there is no way to take a screenshot of the video freezing happening.

Good luck...