This is the issue that keeps me using Claws Mail. With Claws Mail I can set a consistent, universal font size (meaning that the font in each email body is the s

This is the issue that keeps me using Claws Mail. With Claws Mail I can set a consistent, universal font size (meaning that the font in each email body is the same size). With Thunderbird, that seems to be impossible, even with a custom .css file.