After click on a specific E-Mail the mail doesn´t open. It is just empty without any content. The Add-ons is only usefull for checking incoming E-Mail, but not for open or reading it. :(

Perfect, there is no way to reset settings and now I'm stuck with the HTML version. I tried uninstallíng and reinstalling without success...

I cannot view the entire email messages
and I cannot return to the original viewer for the single page...or....remover the use of the sidebar after being searched for in the browser.

Bon