Rated 4 out of 5 stars

Custom styles reset to default everytime FF restart :-(
I have FF 11.0 on Windows 7 64 bit

This review is for a previous version of the add-on (1.1.0.1-signed.1-signed). 

Very sorry about that. Thanks so much for the report. I have a fix for that in version 1.2.0 Ill be releasing within next 48 hours max :)