Tips and tricks for successful Thunderbird add-on development.
Tips and Tricks for Add-on Development
Go into the advanced preferences editor, create a boolean preference called
nglayout.debug.disable_xul_cache if it doesn't already exist, set it to true, and restart Thunderbird.
-purgecaches command-line option
DMO claims that specifying the
Tell XUL Runtime service to invalidate caches
One way to make this happen automatically is by installing the userChromeJS add-on and then putting the code above into the file
chrome/userChrome.js within your Thunderbird profile directory.