Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

为提升您的使用体验,本站正在维护,部分功能暂时无法使用。如果本站文章无法解决您的问题,您想要向社区提问的话,请到 Twitter 上的 @FirefoxSupport 或 Reddit 上的 /r/firefox 提问,我们的支持社区将会很快回复您的疑问。

搜索 | 用户支持

防范以用户支持为名的诈骗。我们绝对不会要求您拨打电话或发送短信,及提供任何个人信息。请使用“举报滥用”选项报告涉及违规的行为。

详细了解

unable to play videos from youtube on firefox

  • 7 个回答
  • 275 人有此问题
  • 12 次查看
  • 最后回复者为 BrendaL

more options

I am unable to play youtube videos on Firefox after the updates. Firefox works great with Facebook but can no longer play videos there. I have down loaded adobe flash player it wont work either I dont know what else to do. I have windows 7. Please help.

I am unable to play youtube videos on Firefox after the updates. Firefox works great with Facebook but can no longer play videos there. I have down loaded adobe flash player it wont work either I dont know what else to do. I have windows 7. Please help.

所有回复 (7)

more options

Do you see the Flash plugin on the Tools > Add-ons > Plugins and the about:plugins page?

Does the Flash test site confirm that the Flash player is installed?

more options

The same here. No video on youtube at all, suddenly. I have latest flash player installed.

more options

Download CCleaner, scan and clean....then problem will be solved ;) I fixed mine that way.

more options

The latest Adobe Flash plugin adds a 64-bit player as well as the standard 32-bit player. Youtube seems to set a cookie that conflicts with the 64-bit version and therefore causes you to see a black screen when trying to play videos. The following steps should fix your issue if it is related to this update:

  1. Click the Firefox menu on the top left (or the Tools menu if you use the menu bar).
  2. Go to History -> Clear Recent History (Omit first part from the Tools menu).
  3. Make sure both Cookies and Cache are check-marked (feel free to uncheck everything else)
  4. Set the Time range to clear drop-down box to Everything.
  5. Click the Clear Now button.

You should now be able to play Youtube (and presumably) other videos again. Doing this worked for me anyway...

由Ketonom于修改

more options
more options

This did not resolve the problem for me. Sadly. Videos play OK one IE but I don't use it as a rule.

more options

This is a Flash player issue - I uninstalled the latest Flash Player and reinstalled Flash 10.3 and everything seems to be working again.

(Youtube videos were just coming up as a black box with a play button - when I pressed this I got the message "An error has occurred - please try later"