In Firefox you can enable the option "Ctrl+Tab cycles through tabs in recently used order" (vs. cycling in normal order 1-2-3-4-1...). Is there a way - maybe about:config or an extension - to enable this for Thunderbird, too? I could not find a solution searching the extensions or the web. I have always like 5, 6 tabs open containing mails or opened PDF attachments and would like to "jump" between two tabs easily. PS Or maybe a feature request for this to follow?