Welcome to Firefox for Android Add-ons.
Add extra features and styles to make Firefox for Android your own.
CloseReview for Session Manager by DirkH
Rated 5 out of 5 stars
Without this extension updated for FF57, there is no reason why you should not use another browser ... I will do so.
Same for TabMixPlus and Adblock Plus.
To create your own collections, you must have a Mozilla Add-ons account.