The -moz-appearance and -webkit-appearance properties are non-standard versions of this property, used (respectively) by Gecko (Firefox) and by WebKit-based (e.g., Safari) and Blink-based (e.g., Chrome, Opera) browsers to achieve the same thing.
Background Color: Changes the background color of the top toolbars. The appearance CSS property is used to display an element using platform-native styling, based on the operating system's theme. Thanks to an anonymous commenter for this tip. Firefox Browser Mozilla VPN In Mozilla Thunderbird Format and add pictures. In Firefox Color, use the Advanced Colors / Tab Selected setting. I couldn't see a way to set the color in Firefox Color. Useful if you don't want to change link colors at all. It can be configured to set custom colors for individual pages, a folder, site or domain. I want the active tab to be much brighter. Color That Site - The add-on for Firefox allows you to change the foreground and background color of web pages that you visit in Firefox permanently.I mostly like the new design though, but I strongly dislike some elements, especially the tabs: Firefox 89 has a new appearance, removing features (ugh) and annoying some people while delighting others.
