Opera's Best Features :: Collections :: Add-ons for Thunderbird

Opera's Best Features

Opera Software: Get the best, most popular features of the Opera browser in Firefox.

Rated 4 out of 5 stars 395 reviews

1,201 users

Minimizes windows into the system tray.

Rated 5 out of 5 stars 204 reviews

61 users

A simple note-taking extension.

Rated 4 out of 5 stars 1,525 reviews

19 users

Direct access to your most visited websites

Collections are groups of related add-ons that anyone can create and share.