I have been using FireFox since its release last year. I loved the product as soon as I saw it. It is extensible, and this extensibilty has provided far more functinality than is available in IE. IE7 had done a nice job in catching up, but FireFox still has the edge. Plus I can get rid of the worst of the ads, making browsing a far more pleasant experience.
While I like Firefox, it's not without it's issues. It turns out that there's been a bug in the product for years around cut/paste not working randomly But now there is a fix, as described in Firefox 22.214.171.124 Fixes the Copy & Paste Bug at Last! at Ramblings of a Computer Guru. And here I thought this problem was local to me!
The solution is to upgrade to 126.96.36.199!