Ohodnoceno 5 z 5 hvězdiček

I use this all day long, great add-on!! I downloaded the preview release but when I try to add it, TB tells me it's corrupt. I've downloaded it again, same issue. I can open the zip just fine. Please help.

Tato recenze je pro předchozí verzi doplňku (5.21). 

Drag the link of the xpi file into Thunderbird's add-on manager. If you need further assistance, please file a GitHub issue.