I've been using Firefox as my default browser for at least 8 years (after switching over from Netscape Navigator). I've never had any problems before, and I love Firefox!… (funda kabanzi)
I've been using Firefox as my default browser for at least 8 years (after switching over from Netscape Navigator). I've never had any problems before, and I love Firefox! Per your info., I've assumed that FF automatically updates to the latest version (it's always been set in my Preferences to do that). But after I got up to Version 10.0, it apparently stopped doing that! When I would check the version, it would say "You are on the update release version" (paraphrase) and then the "checking for updates" circle would just spin.
Three days ago (June 28, 2013), I tried to go to what I assumed was a trusted site (Obama's Organizing for Action) (from a link on an e-mail notice), and I got a notice that FF considered this an untrusted site(?) The next day (June 29, 2013), I tried to reach another trusted site (via Google), the California Lifeline site (phone company), and I got the same "untrusted site" notice(!)
At this point, I decided to see if my FF was up to date. I checked info. on your site and found out that the latest version was 22.0! (Why wasn't it updated for all the versions after 10.0?!) So I downloaded the latest version. When I opened the new version, FF was terribly slow!! It takes forever to load websites or to switch between sites, or to do just about anything! THIS HAS NEVER HAPPENED BEFORE! I've read many articles on what could be wrong and how to potentially fix it, but I'd rather start here! Please help as soon as possible! Thanks much in advance!