disappears on exit Rated 3 out of 5 stars

The menu options disappear when I exit Firefox. Have to reinstall every time I want to use it.

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

I apologize for the inconvenience. I recommend to reinstall the Firefox app after cache deletion because the problem is probably derived from a firefox's bug, but not the add-on. Unfortunately there is nothing I can do for it now. If I found a way to reproduce the bug, I will report it to Bugzilla. Thanks.