Just Released June 5th Thunderbird ESR 10.0.5 Thunderbird 13 June 7th Thunderbird 14 Beta (14.0b1) June 14th Thunderbird 15 Earlybird (15.0a2) June 15th Thunderbird 13.0.1 Coming Soon July 17th Thunderbird ESR 10.0.6 Thunderbird 14 Thunderbird 15 Beta (15.0b1)* Thunderbird 16 Earlybird (16.0a2)* Future Releases August 28th Thunderbird ESR 10.0.7 Thunderbird 15 Thunderbird 16 Beta (16.0b1)* Thunderbird 17 Earlybird (16.7a2)* * As part of the new Rapid Release Schedule,dates listed for Earlybird and Beta builds reflect when the code merge is set to begin. The actual release to that particular channel may vary by several days. See the Wiki for more…

It is possible to change the display font and the size of the font on the Thunderbird User Interface. However, it is not something that can be done within Thunderbird. You will need to modify your userChrome.css file within your Thunderbird  profile folder. Follow these directions below to make the modifications: From within Thunderbird go to Help > Troubleshooting Information In the Application Basics section next to Profile Folder, click the Show Folder button An Explorer/Kernel Window should open to the location of your profile folder. CLOSE Thunderbird Go the Chrome folder and locate the file userChrome.css and edit. Note: Some installs of Thunderbird may not include a chrome folder. If this the case create…