Welcome to Firefox for Android Add-ons.
Add extra features and styles to make Firefox for Android your own.
CloseReview for Remove Duplicate Messages by sna696
Rated 3 out of 5 stars
Unfortunately this plugin freezes the Thunderbird's UI for a while then suddenly and silently crashes. It sounds like it's incompatible with the latest TB versions.
I'll wait for an update
To create your own collections, you must have a Mozilla Add-ons account.