This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Firefox can't play youtube videos on youtube; only embedded on other sites or in email.

all_thats_missing
all_thats_missing
more options

Since yesterday I can't access videos on youtube any more. The page opens as it should and I can see all the video information and all comments and video suggestions, but the player itself is only a black screen. There are no controls and no picture.

I can still watch the videos embedded on other sites or in email, but not directly on youtube.

It's definitely a Firefox-related issue, because I double-checked with Chrome and IE and everything worked fine with those browsers.

Since yesterday I can't access videos on youtube any more. The page opens as it should and I can see all the video information and all comments and video suggestions, but the player itself is only a black screen. There are no controls and no picture. I can still watch the videos embedded on other sites or in email, but not directly on youtube. It's definitely a Firefox-related issue, because I double-checked with Chrome and IE and everything worked fine with those browsers.

Modified by all_thats_missing

All Replies (3)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options
  • If you use extensions like Adblock Plus or NoScript or Flashblock that can block content then make sure that such extensions aren't blocking content.

Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of your add-ons is causing your problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).

  • Don't make any changes on the Safe mode start window.

See Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems and Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems

See also http://kb.mozillazine.org/Dom.storage.enabled

all_thats_missing
all_thats_missing Question owner
more options

I tried it, but it still doesn't work. It looks like this - http://img254.imageshack.us/img254/6859/whyyyy.png - no matter if I'm using Safe Mode or not.

And as I said, I can still play the videos if they're embedded somewhere. It's just on youtube I get that black box.

all_thats_missing
all_thats_missing Question owner
more options

I solved it! I used CCleaner, and when I turned on Firefox again youtube showed the player as normal.