Welcome to Firefox for Android Add-ons.
Add extra features and styles to make Firefox for Android your own.
CloseReview for Gmail Manager by fralexisthomas
Rated 5 out of 5 stars
Here is my link of fixed XPI
https://github.com/downloads/ath0mas/mozilla-firefox-addons/gmail_manager-0.6.4.1.3-fx+sm.xpi
Addon works again for hosted and normal Gmail accounts
To create your own collections, you must have a Mozilla Add-ons account.