My Firefox freezes on Google product pages like Google News & getting unresponsive script error.
After a small bit of found that Avast online security is causing the problem. Simply disabling it has fixed the problem & Firefox is became very fast now.
When I have searched for this issue, There are lot of user complaints even in avast forum regarding this issue from the last one year. But, It is not yet fixed.
I had the same problem with the script error on Firefox, also with IE. I had just installed the latest version of Avast which was causing the problem (2014.9.0.2014). I was also having problems running uTorrent. I uninstalled Avast completely, then downloaded and installed an older version (2014.9.0.2006) which solved the problems. You can download older versions of Avast from www.oldapps.com. I know it’s a free product and all, but Avast needs to address this problem pronto, this is serious.