Hi,

Please check if this happens in Safe Mode after enabling only the Flash plugin in Tools (Alt + T) > Add-ons > Plugins.

Same problem, I disabled all the plugins except Flash and ran in Safe Mode but i get always the same problem.

What do you mean Firefox is blocked? Is there a message saying Youtube is blocked? Or is there just a black box where the video is supposed to be?

A screenshot of the Youtube page would help here.

You can use this addon to help you take a screenshot of the problem:
https://addons.mozilla.org/en-US/firefox/addon/awesome-screenshot-capture-/

Or you can use Windows Paint, read this article for instructions:
https://support.mozilla.org/en-US/kb/how-do-i-create-screenshot-my-problem

Then attach the picture to your post before you reply to the "Add images" area under the reply box.

Or upload it on a website like:
http://imageshack.us/

The browser not response to any command (I can click anywhere but the browser is not working). If I post a screenshot you will see all normal.

Does that only happen with that Aurora version or with the regular Firefox 10.0.* as well?

Create a new profile as a test to check if your current profile is causing the problems.

See "Basic Troubleshooting: Make a new profile":

• https://support.mozilla.org/kb/Basic+Troubleshooting#w_8-make-a-new-profile

There may be extensions and plugins installed by default in a new profile, so check that in "Tools > Add-ons > Extensions & Plugins" in case there are still problems.

If that new profile works then you can transfer some files from the old profile to that new profile, but be careful not to copy corrupted files.

See:

• http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

Nothing. I made a new profile and then I opened a yotube page. The video starts, continue for 10 sec and then blocks. The sound still works but when the video stops the browser don't respond (I can click anywhere but it's like I click on the desktop's picture with the left click). If I press CTRL+ALT+CANC, the music stops too.

The same problem affects also Firefox 10 and the 11 beta.

Are you signed into youtube when this happens?

No, i'm not. Please note that maybe this happends because I don't have some plug.in or what because I rebooted my pc.

Does that only happen on the Youtube site?

You can check for problems with the plugin-container process.

• http://kb.mozillazine.org/Plugin-container_and_out-of-process_plugins

Well, I'm not really sure. Because three or four times it happend also at some other pages, but I do not know why.

P.S.: I really didn't understood nothing of the lick you sent to me. Can you tell me what part of it must read? Thanks ;)

The link is an informational page. You can try the different settings of the crash protection features of Firefox. Please also try this: Open the Windows Control Panel > Flash Player, click Delete All and Delete Data. This deletes the stored flash data and the settings for sites like Allow, Block etc.

[Please also try this: Open the Windows Control Panel > Flash Player, click Delete All and Delete Data. This deletes the stored flash data and the settings for sites like Allow, Block etc. ]

Wow, it worked. I don't know how to thank you :) Thanks to all of you.