Unable to add to favorites 2

Recently I have become unable to add any posts to favorite.

I checked this topic:
topic #12911

But it didn't help. The problem is still there and seems to be browser-specific: everything works fine in Opera but I cant favorite in the latest Mozilla. Voting in Mozilla doesn't work either

I hope this bug gets fixed as I cant save pictures from Opera in turbo-mode

Do you have Javascript turned off, or have an extension such as NoScript that does that...?

I ask because that's the most common reason for it not working on one particular browser.

BrokenEagle98 said:

Do you have Javascript turned off, or have an extension such as NoScript that does that...?

I ask because that's the most common reason for it not working on one particular browser.

I have just checked: I have True in "javascript.enabled"
I tried disabling GreaseMonkey and it worked.

Could you explain please, why GreaseMonkey disables some site functions?

No, the problem is still here.
I have no idea why 'F' sometimes works and somrtimes doesn't.
Mysterioous

The next time it happens press ctrl+shift+K to open the developer console and check for any red error messages. Paste them here if there are. Voting and favoriting depend on javascript, so if there are javascript errors it can prevent those things from working.