Hello Malware Fighters,
Javascript is not the root of all browser evil, but of a lot of it. So do not uninstall your NoScript plug-in only for those sites that are to be trusted (search with scandoo, have siteadvisor etc). But why you have to update now, you may read here:
http://www.kb.cert.org/vuls/byid?searchview&query=firefox_1505
Well in later versions the update comes automatically.
polonus