Stylish Does not work Rated 1 out of 5 stars
Since updating to Stylish 1.07 Firefox needs to constantly reboot and will not install the Add-on. Had this problem before. This is total garbage!!
Reinstalled FF 3.5.4 and still the same problem.
This is generally a problem with Firefox, not Stylish. See http://support.mozilla.com/en-US/kb/Unable+to+install+add-ons