Rated 1 out of 5 stars

The latest version of Stylish will NOT Install properly and I no longer have my Stylish add-ons. I keep having to reboot Firefox without the Installation taking place.

Ran the checklist that you posted and everything is normal in FF 3.5.4
It's not only Stylish that won't install but some other Add-ons as well.
Some installed O.K. while others will not install, including Stylish!!

This review is for a previous version of the add-on (1.0.7).