I've always upkept my userChrome.css with two main effects in mind: - tabs on bottom - general transparency of the bars The latest update luckily spared both (it actually turned the tabs' close button red, but whatever...) but, now, 3 icons that I had placed on the right end of the tab bar have disappeared; I've already checked the toolbar customization menu, but they haven't been moved there. Anyway, this time I haven't been able to solve it on my own, unfortunately... ❦ My current userChrome.css is: https://pastebin.com/FhqK2BWu And my "special" about:config settings, which I've customized over the years to set everything back to how it looked before the progressive updates, are: https://pastebin.com/qVDsQ2T3 ❦ Can anyone please suggest a solution? Thanks for your attention!