I get the "unresponsive script" message now for nearly all sites, and sometimes this is followed by the popup box saying that the "plugin contain for Firefox has stopped working."

Many sites now say that a script is unresponsive. And by unresponsive I mean that the whole browser slows to a crawl and it can take ~20 minutes to get 2 pages loaded. Also, I sometimes get a popup window saying the the plugin container has stopped working. This whole issue is making Firefox unusable. I cringe to say it, but I'm currently in IE. :-/