Rated 5 out of 5 stars

Just followed the link stated a few posts below mine:

https://github.com/tomondev/gmail-manager/blob/master/target/gmail-manager-0.6.4.1.5-tomondev.xpi?raw=true

Couldnt open in it straight to install so I downloaded it to my desktop the xpi file, went to addons, and used the install from file and its working great now. Thanks for the continued support on this. Such a useful tweak

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