I just found out that Google has decided to not support the Google Toolbar in Firefox 5 and later. I had been waiting for sometime to upgrade Firefox for this very reason. Now that "waiting" won't do me any good, I've decided to resort to the Add-on Compatibility Reporter Hack. It seems like it will work for now, but how long until newer versions of Firefox prevent this from working.
It's sad that Google has decided to take this approach. Google toolbar is always one of the first extensions that I install in Firefox. It seems like they are trying to push people to Chrome, which is sad. I think Firefox may have shot itself in the foot with it's rapid release cycle, but I really don't think it has anything to do with Google's decision.