Changing all background colours in TB 68.0
So, I've just updated to Thunderbird 68.0 from 60.8.0. Previously I had, through userChrome.css and the Theme Font & Size Changer extension (at times i used one or the other - can't remember now which was active last) changed the background colour to a light green. This applied in the main Thunderbird window panes (group and message list), separate message read and compose windows, AND in the calendar, task and other tabs in the main window and in the address book. In 68.0. though, while the main window tab, with group and mail list panes, and the message read and compose windows are still the colour I want, the calendar and task tabs and the address book have reverted to white backgrounds. Theme Font and size changer is disabled (not compatible with 68.0). How do I globally change the background colour in ALL tabs and windows to me preferred colour in 68.0? Thanks.
Opaite Mbohovái (2)
To make TB 68 read userChrome.css or userContent.css files, you may have to switch the preference toolkit.legacyUserProfileCustomizations.stylesheets to true in Tools/Options/Advanced/General/Config. editor.
https://bugzilla.mozilla.org/show_bug.cgi?id=1541233
Your existing css files may then work for Address Book and Calendar. I found this post about the address book color.
Unfortunately that preference was already set to true, and the addition to userChrome.css made no difference. I've also noticed that the font size in the group and message list panes is smaller than it was and than I want it, but it is not reacting to changes in userChrome.css.
Well, the author of the Theme Font & Size Changer extension has said he's looking into getting the extension working in 68.0, so I guess I'll wait and see if he does and that fixes things (I did see the extension's settings are still there in config).
Thanks for trying to help.