Perhaps FF 4, 5, 6, and now 7 suck but no browser software on the planet sucks more than the various flavors/versions of IE these days. Personally, I'm sticking with FF 3.6.xx (now .23) and am having NO problems with Facebook or most other general sites. Some of the vendor tools/browser utilities I use regularly require me to use IE and it really sucks that any web developer/company would require the use of IE for their utility to work.

If everything is going to the cloud and we are all going to use browsers to do everything, then I agree with the author that FF needs to step up and become the rock solid browser it was at version 3.6 (or a bit earlier).