Troubleshooting YouTube on Firefox Shake And Flicker!

[Chromatinfish 123]

When I finish uploading a video on YouTube in Firefox, I noticed that the video was shaking and every few seconds the video would flicker a black screen! I tried it in Internet Explorer, Chrome, Opera, etc., and this wasn't happening. My build:
Firefox Nightly 33.0a1 (07-01-2014)

 

[MrXidus]

Does this happen in Firefox 30.0? I assume it's an issue with Nightly.

 

[Chromatinfish 123]

Does this happen in Firefox 30.0? I assume it's an issue with Nightly.

Do you think it is a hardware issue (video card) or software issue (OS, browser)?

 

[WinXPert]

more like a browser problem to me

 

[Littlebits]

Try using the latest stable version of Firefox, Nightly builds are known to have problems.

Enjoy!!

 

[Chromatinfish 123]

My friend's computer ONLY has IE on it (gasp) and it has the same problem that I have with Firefox

 

[Chromatinfish 123]

Pale Moon has the problem too...

 

[Littlebits]

Pale Moon has the problem too...

Check your extensions- especially if you have any Youtube or video downloading extensions. Try disabling them one at a time, also NoScript can cause this problem.

Enjoy!!