Is it possible to remove the blue background color that is activated when you select a message? How can I get rid of this blue background? I have vision problems, I am visually impaired. I set thunderbird with a dark theme by adding a "dark reader" extension for my difficulty in viewing on a white background, extremely annoying for those with vision problems. Again for the same reason, the blue background on a bienco character is difficult to see. Before the last few it was fine. The selected message was highlighted with a perimeter light gray border, a good compromise for the sighted and visually impaired.