Review for Gmail Manager NG by Twolane
Rated 5 out of 5 stars
Palemoon 26.4.0 (x86) Stopped working with latest Gmail update. Goes straight to Verify it's you page and wants verification. Even after verification login, still goes to Verify page on subsequent login attempts.
It's a five-star addon when it works, but google apparently isn't happy with any of the auto-login addons lately. Typical of google.
To create your own collections, you must have a Mozilla Add-ons account.