Comment 11 for bug 2033988

It seems to no longer be an issue in Firefox 127.0.2. One thing I noticed is that when using a dark theme, if no custom CSS is used (when ~/.config/gtk-3.0/gtk.css is renamed or moved, for example), a black background with white text is used for the sidebar, the context menus, and the bookmark manager. I believe those used to honor the theme's colors. As it pertains to this issue, however, at least all of the text is now readable and it seems I no longer need to keep the work-around in place.