hello, maybe that's an issue with hardware acceleration - please try updating your graphics driver, or in case this doesn't solve the issue or there is no new version available at the moment, disable hardware acceleration in the firefox menu ≡ > options > advanced > general (that setting will take a restart of the browser to take effect).

YouTube is generally serving Firefox users the HTML5 player now instead of the Flash player. You can check which one you're getting by right-clicking the player and inspecting the bottom line of the short context menu. Since the fixes probably are completely different for the two players, it would be helpful to know which one is having the problem.

Also, there is an add-on you can use to switch the player if you want to try that (this is no longer easy to do using built-in YouTube settings): https://addons.mozilla.org/firefox/addon/youtube-flash-video-player/

Noparat said

I only get sound but no picture or image on YouTube-what to do? I am now using "Chrome" browser whenever I want to visit YouTube, I do not wish to use 2 browsers and I wish to stay with Firefox only. I have tried many solutions without any success. Help!!!!

I wish to express my most sincere thanks to the person who responded to my problem. I imediately went to download and apply the "add-on" and it worked I am a very happy man once again. By the way, yesterday, I just upgraded my new flash to the "18" model.

Most sincerely thanks Noparat S.

Dear Jscher2000,

Please accept my apologies for not having mention your name in my respond to the success of my "YouTube" problem. Thanks.

Sincerely, Noparat