As you can see below, I got sick of adding new config extensions.checkCompatibility.* values each release. I've done it enough times since Firefox 3.6 and I'll be damned keep doing it.
Here comes a nifty little Firefox addon from Kris Maglione called "Disable Add-on Compatibility Checks".
Download it. Since addon developers can't keep up with the insane release cycle rates that Mozilla has adopted, I can't recommend it enough!
Like a passive user gone postal, I'm giving Firefox checks a smackdown!