Thunderbird and Theme Font & Size Changer

[deustroop]

I have used this add on with FF and Thunderbird to enlarge the menu fonts for much better viewing. When Mozilla went all extensions, this add on was set to expire, like other non WebExtensions . But buddy David E. Ross has made a non expiring version which, while it will not install into FF, works nicely in Thunderbird.
He notes that "When Mozilla finally mandates only WebExtensions to the exclusion of prior extensions, I have no plans to create a new WebExtension version. Before that dreaded time, I will update this only when needed for compatibility or new features in the expiring version."

Nice.

http://www.rossde.com/ThemeFontSizeChangerNoexpire/index.html