Welcome to Firefox for Android Add-ons.
Add extra features and styles to make Firefox for Android your own.
CloseDeveloper reply by Rob Norris
Rated 5 out of 5 stars
Never mind, it suddenly started working in T-bird again... might have been a problem with another extension.
This review is for a previous version of the add-on (1.3.20110715.1-signed). This user has a previous review of this add-on.Cool, thanks for the update.
I got around to trying it with Thunderbird 5 (both Linux & Windows) and had no problems, so I was confused by your initial report.
Glad it's resolved itself!
To create your own collections, you must have a Mozilla Add-ons account.