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I can't play youtube video and tumblr audio on firefox

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  • Èsì tí ó kẹ́hìn lọ́wọ́ ariatsubaki

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Youtube video are blank black screen and can't playing audio post from tumblr. This happened after I installed Java 7 update 55 and flash player. I have the latest version of firefox 28.0, flash player activeX & plug in version 13.0.0.26

Youtube video are blank black screen and can't playing audio post from tumblr. This happened after I installed Java 7 update 55 and flash player. I have the latest version of firefox 28.0, flash player activeX & plug in version 13.0.0.26

All Replies (12)

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Hello, can you please try updating your Firefox to latest version that is Firefox 29. Update Firefox to the latest release

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Many site issues can be caused by corrupt cookies or cache. In order to try to fix these problems, the first step is to clear both cookies and the cache.

Note: This will temporarily log you out of all sites you're logged in to. To clear cache and cookies do the following:

  • Go to Firefox > History > Clear recent history or (if no Firefox button is shown) go to Tools > Clear recent history.
  • Under "Time range to clear", select "Everything".
  • Now, click the arrow next to Details to toggle the Details list active.
  • From the details list, check Cache and Cookies and uncheck everything else.
  • Now click the Clear now button.

Further information can be found in the Clear your cache, history and other personal information in Firefox article.


Try to disable hardware acceleration in Firefox (you need to close and restart Firefox).

You can check for problems with current Flash plugin versions and try these:

  • disable a possible RealPlayer Browser Record Plugin extension for Firefox and update the RealPlayer if installed
  • disable protected mode in the Flash plugin (Flash 11.3+ on Windows Vista and later)
  • disable hardware acceleration in the Flash plugin
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I tried this but I still have the black blank screen, but it has improved for audio tumblr

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Is only the Flash player missing or other elements as well?

You can check for problems with current Shockwave Flash plugin versions and try this:

See also:

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Java probably doesn't have anything to do with this.

To avoid confusion:


Did you try Firefox Safe Mode?

You can use one of these to start Firefox in Safe Mode:

  • On Windows, hold down the Shift key while starting Firefox with a double-click on the Firefox desktop shortcut
  • On Mac, hold down the Options key while starting Firefox
  • Help > Restart with Add-ons Disabled
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I think it solved. youtube video problem has been completed because HTML5. but i have to request from http://www.youtube.com/html5. is there any other way, such an installed?

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but.. its comeback again, audio tumblr can't playing. plugin slider doesn't show up on volume mixer :(

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Are you using any extensions that can block content?

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just idm cc, its update too

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ooh, the trouble is in IDM, because IDM starts downloading audio automatically when I start playing it in a browser. now I can avoid it. the youtube video problem is fix because html5. can I installing Youtube all html5 on my add-ons?