I have tried every solution without success.
For the past few months I cannot use Facebook for more than a few minutes before it slows to a crawl and I start getting the "Unresponsive Script" errors. Clicking on stop the script changes nothing although it often slows FireFox to freeze. I have the latest version of all of the programs. I have deleted FF and Shockwave and the rest and reinstalled with no change in slowness. I have installed the YesScript which immediately froze FF. The problem arises on other pages now and then but with FB it is every single time. I have Kaspersky for anti-virus and MalwareBytes and CryptoPrevent for protection.
I have asked this question repeatedly and have never received even one person's assistance. PLEASE help me with this.
Opaite Mbohovái (1)
Locking this thread.
You received 3 answers over here - https://support.mozilla.org/en-US/questions/1000084 - and one here - https://support.mozilla.org/en-US/questions/998748