Rated 3 out of 5 stars

gives some options to autoinserted reply header but You no more can fit it in one line

This review is for a previous version of the add-on (2.3.0). 

Hello, Andrey Korzh - Thank you for your review and feedback. Appreciated!

I couldn't understand the options you have mentioned, do you mind creating an issue in Github with detailed info. So that we can discuss it there.
https://github.com/jeevatkm/ReplyWithHeaderMozilla/issues

- Jeeva