#38 & 39
Modify Thunderbird to make the text larger by default and the icons better. Their updates of late made all the text too small and they went with the flat plain look for the icons.
Scroll half way down for directions:
Thunderbird email program
http://www.davidshelpsite.com/firefox/firefox_tabs.html
BTW you can use the scroll wheel on the mouse to make the text bigger and it will stay at the size you want for all messages until you close the program.
Thunderbird Support
https://support.mozilla.org/en-US/products/thunderbird