Om de ûnderfining foar jo te ferbetterjen is tydlik de funksjonaliteit dan dizze website troch ûnderhâldswurk beheind. Wannear in artikel jo probleem net oplost en jo in fraach stelle wolle, kin ús stipemienskip jo helpe yn @FirefoxSupport op Twitter en /r/firefox op Reddit.

Sykje yn Support

Mij stipescams. Wy sille jo nea freegje in telefoannûmer te beljen, der in sms nei ta te stjoeren of persoanlike gegevens te dielen. Meld fertochte aktiviteit mei de opsje ‘Misbrûk melde’.

Mear ynfo

Dizze konversaasje is argivearre. Stel in nije fraach as jo help nedich hawwe.

I can play games that use Flash in Firefox 11, but I can't watch any YouTube videos at all. Why?

  • 2 antwurd
  • 21 hawwe dit probleem
  • 14 werjeftes
  • Lêste antwurd fan cor-el

more options

For some reason, YouTube videos won't play on Firefox. I have the latest Firefox browser (11.0) and the latest Flash player (11.2.202.228). I'm also on Windows 7 if that matters at all. What's weird is it just stopped working literally minutes after my sister watched the last YouTube video that worked.

Now when I go to YouTube on any computer with Firefox, when I go to a video there's just a black box and when I right click it it says "Movie not loaded..." and none of the video thumbnails are visible either.

So far I tried disabling Firefox's crash protection for Flash, and disabled hardware acceleration but neither one fixed my problem. Please help if you can.

For some reason, YouTube videos won't play on Firefox. I have the latest Firefox browser (11.0) and the latest Flash player (11.2.202.228). I'm also on Windows 7 if that matters at all. What's weird is it just stopped working literally minutes after my sister watched the last YouTube video that worked. Now when I go to YouTube on any computer with Firefox, when I go to a video there's just a black box and when I right click it it says "Movie not loaded..." and none of the video thumbnails are visible either. So far I tried disabling Firefox's crash protection for Flash, and disabled hardware acceleration but neither one fixed my problem. Please help if you can.

Alle antwurden (2)

more options

Also, the test animation for Flash still works at http://www.adobe.com/software/flash/about/

more options

Clear the cache and the cookies from sites that cause problems.

"Clear the Cache":

  • Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now"

"Remove Cookies" from sites causing problems:

  • Tools > Options > Privacy > Cookies: "Show Cookies"

Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance/Themes).