Gmail Manager is a Firefox extension that allows you to manage multiple Gmail accounts at the same time. You access your panel from an icon located in the status bar.
The application displays a variety of information, for example: notification of new emails , access to e-mails saved as a draft for further editing, folders organized with labels, spam mails and some other elements.
The interesting thing is that with just one click, and without changing tab when another task is being performed, you can access any of the Gmail accounts managed by this application. Includes own editor to write or reply to emails.
Once the application is installed, an icon is added in the status bar, from where the information will be accessed. The icon is customizable.
Gmail Manager 0.6.4.1 is the latest version (March 2011) of the extension for the browser, but it has stopped working correctly since Firefox 29 because the status bar has been removed (although it could be reset with An add-on called Status-4-Evar).
As an alternative to the above, there is another add-on called Gmail Manager NG (0.6.5.2), which works fine until browser 32 update, so we have changed it (until the fault is resolved). You can also download it for free to install.