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In Thunderbird 115 (Supernova) is there a way to configure the Message list view so that it has grid lines, or "zebra striping"? I find it easier visually to look at.

Thanks!

After upgrading to 115.0, the mailbox display has an all-white background. This is not nearly as easy to read is in version 112, which has alternating lines of white & grey for the background.

How can I customize 115 to have alternating colours for the background of each summary line?