No HTTPS Rated 5 out of 5 stars

Do what it says its does.I hope that the links will be change to go to https for a better security. And a french translation would be nice.The same button for google Agenda and google contact would be great.Keep on running.@viviane001: To install the button, personalize your toolbar (right click on an empty space between 2 tool buttons) and drag'n'drop Gmail Button from the popup window to the toolbar.
The v1.0.1 has the HTTPS and the french translation. Great stuff

This review is for a previous version of the add-on (1.0.1-signed.1-signed). 

Thanks for the suggestion. The v1.0.1 version will have it!