Welcome to Firefox for Android Add-ons.
Add extra features and styles to make Firefox for Android your own.
CloseReview for MetaClean for Thunderbird by GVS
Rated 2 out of 5 stars
Who knows if it works? There is one problem with it that has made me stop using it:
IMAP accounts can randomly and completely stop responding when this add-on is active. For example, you compose a message and go to send it and then it wants to copy the message to the SENT folder. It will just hang there for hours. If you disable the add-on it immediately copies the message to the sent folder. I have the same issue when I choose to compact my IMAP folders.
When I disable this add-on IMAP accounts work perfectly; when it is enabled I have issues like the above randomly.
To create your own collections, you must have a Mozilla Add-ons account.