The natural Successor of userContent.css Rated 5 out of 5 stars
I used to write custom.css's for Opera till they gave up on their Presto Engine so unwilling to use anything Chrome-related I bounced back to Firefox but converting to and meddling with the userContent.css was very impractical...
At first I was looking at greasemonkey but not knowing the differences between this and tampermonkey for chrome made me turn my back on it, basically I wanted to write themes/styles supporting all if not most browsers and at ease.
Into my life came Stylish.
So far it had/has all that I need and all my old .css could easily be transfered into this smart addon and I love it.
There's two things I kind of wished it had though:
1) A proper option to easily import/export styles.
2) If selected, have the plugin recognize the user and allow him to directly push updates to userstyles.org via the addon rather than c/p-ing.
To that guy complaining and downvoting this addon: dont install addons via google.