Welcome to Firefox for Android Add-ons.
Add extra features and styles to make Firefox for Android your own.
CloseDeveloper reply by Firefox user beeb85
Rated 2 out of 5 stars
In Thunderbird this extension does not go in the sense that totalization of folders is not correct and sometimes numbers disappear.
You must control because this extension is wrong with the last Thundebird release 24.
Bye.
Hi, the add-on does not control the numbers themselves, it only displays the numbers that Thunderbird provides.
You need to file a bug on Thunderbird itself about the numbers being incorrect, explaining which numbers, and roughly when they disappear.
To create your own collections, you must have a Mozilla Add-ons account.