Review for Gmail Manager by arixol
Rated 5 out of 5 stars
Very small footprint in the bottom right corner. Clicking the bottom right corner opens a new tab and loads your Gmail. Has the ability to play a sound when email arrives, and you can set the time interval for checking email. Makes checking multiple accounts a breeze.
Very awesome add-on. A must have.
To create your own collections, you must have a Mozilla Add-ons account.