Youtube Error.

[colley30]

I am getting a red error message on all Youtube thumbnails with a white exclamation point inside each and every thumbnail I mouse over;

this is only happenining of Firefox 48; it does not happen on Windows 10 Edge; it does not happen on Google Chrome... and it does not happen on Internet Explorer

[DanRaisch]

Have you tried starting Firefox in Mozilla Safe Mode? http://kb.mozillazine.org/Safe_mode
If no improvement using Safe Mode, do you have the same problem if you create a new profile and test it with no extensions or non-default themes installed?
http://kb.mozillazine.org/Profile_Manager
and
http://kb.mozillazine.org/Creating_a_ne ... on_Windows

[therube]

I am getting a red error message on all Youtube thumbnails with a white exclamation point inside each and every thumbnail I mouse over;

Screenshot?

[colley30]

no idea how to send a screen shot on this site

[TheVisitor]

no idea how to send a screen shot on this site

Click the 'blue' link 'Screenshot' that Rube posted, will tell you how to post image here on this board.

[colley30]

too complicated; I believe my verbal description is adequate...

[LIMPET235]

&....Have you tried what Dan posted for you?

Have you tried starting Firefox in Mozilla Safe Mode? http://kb.mozillazine.org/Safe_mode
If no improvement using Safe Mode, do you have the same problem if you create a new profile and test it with no extensions or non-default themes installed?
http://kb.mozillazine.org/Profile_Manager
and
http://kb.mozillazine.org/Creating_a_ne ... on_Windows

Oh yes. The process for posting images here takes about 3 Minutes to complete.

[therube]

@colley30, you're blocking.

[colley30]

I figured it all out; FF 48 installed an additional "Center Youtube" in User Scripts; one was already installed there... just deleted the new one which was installed by FF and the issue went away

[makaiguy]

"Center Youtube"?

Do you mean the Youtube Center extension found here? https://addons.mozilla.org/en-US/firefo ... be-center/

[colley30]

Yes.... it's actually Grease Monkey User Scripts located in Addons...