Review for Gmail Manager by Pinky
Rated 1 out of 5 stars
...at least for me.
I tried it on my husbands XP system, it did not work at all. In fact, it screwed things up so badly I wound up uninstalling the extension.
I have no idea how to even go about trying it on my Linux machines.
Back to square one...
To create your own collections, you must have a Mozilla Add-ons account.