Note: Not sure if this is right forum/sub-forum, I'm new here.
So pretty long time ago I uninstalled Chrome because it was lagging very much and installed Firefox.
Firefox was working perfectly and not lagging at all, until few months ago my browser started "not responding". After 30 seconds I get an "script stopped" message. Now it happened again and I copied the script that stopped.
In 80% of times this script is the cause of lag:
This is strange, cause I even don't have an chrome!
In the 18% of times comes up an s.ytimg (or something like that) script message and other 2% something else like youtube.
This is really annoying, can someone tell me is it malware or something, I don't really know, and how can I stop it?