I like to be able to either accept or not accept the remote content for each message, mostly I don't need it, so I don't want to accept it in general. However, the yellow bar, which I mostly ignore, is quite distracting when browsing through the mails, so I would like to change the color. I already tried several approaches with the userChrome.css, like linked below, none of them worked for me. I am using the newest version of Thunderbird on Windows 11. https://support.mozilla.org/en-US/questions/1413372 https://www.reddit.com/r/Thunderbird/comments/xvoy85/how_to_change_the_color_of_the_remote_content/