[izietto]

Which plugin are you using? it seems life-changing to me

[u801e]

This is the one I'm using: https://github.com/Qeole/colorediffs. I installed it several years ago, so I'm not entirely sure whether you can install it on a current version of Thunderbird, but it is still working with my installation.

[basicexploit]

I might try it out as well! Thanks for it.