To try the thousands of add-ons available here, download Mozilla Firefox, a fast, free way to surf the Web!
CloseWelcome to Firefox Add-ons.
Choose from thousands of extra features and styles to make Firefox your own.
CloseDeveloper reply by Matt H
Rated 1 out of 5 stars
I updated to firefox 48 and it stopped working both on Windows and Mac.
This review is for a previous version of the add-on (20160511.0.0).While it really shouldn't have stopped working, I am planning a multiprocess compatible release. Are you sure the extension is enabled? What version are you using?
To create your own collections, you must have a Mozilla Add-ons account.