Add-ons
To try the thousands of add-ons available here, download Mozilla Firefox, a fast, free way to surf the Web!
CloseWelcome to Firefox Add-ons.
Choose from thousands of extra features and styles to make Firefox your own.
CloseReview for Theme Font & Size Changer for ThunderBird by Firefox user a16201
Rated 1 out of 5 stars
No funciona en Thunderbird 60.3.2
To create your own collections, you must have a Mozilla Add-ons account.
