Thunderbird Highlighted Text Problem After an update of the Thunderbird email program, the text now remains black in a highlighted areas on my main PC. (See Screenshot 1) That makes it difficult to read the text, especially because the blue highlight is actually a bit darker than shown in the screenshot. How can the text be changed back to white in the highlighted area?

I checked the Thunderbird email in my backup PC and the text in highlighted areas is still white. (See Screenshot 2) Most likely that PC’s Thunderbird program missed getting updated because the PC gets seldom turned on.