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TB 115 - CSS Gridlines (vertical and horizontal) in Message Pane
Windows 11
Having waited until some of the most valuable Thunderbird addons were updated for 115, I have now updated to the latest version of Tbird.
I had previously set up userchrome.css to show gridlines between columns and under each message in the Message pane, thus avoiding having a lot of messages just sitting in a white "unanchored" space. Of course, the old css doesn't work in 115.
Has anyone worked out how to get back the gridlines here, either in css or some other method?