monline

First I stumbled on this method. However I did not want to mess around with wrapper scripts, so I took a look at the wrapper in Ubuntu (/usr/bin/thunderbird). It turned out that the wrapper of Thunderbird v2.x sources some user specified scripts on startup (of course only if they exist): every executable in $HOME/.thunderbird/init.d that has a name starting with S gets sourced. A little googling revealed that this is already well documented in the MozillaZine Knowledge Base.