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CloseReview for Gmail Manager by RustyMuppet
Rated 5 out of 5 stars
This does everything I need to handle multiple gmail accounts (need to make sure you only log into 1 account at a time though - and only set 1 up as default login).
Even for a single gmail account I would recommend this extension.
Would be nice if an extra feature could be added - reset count in status bar to 0 when you click on the icon to go to gmail site.
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