Agreed. Google Chrome and Microsoft Edge are already integrating this, and I love the look. Would love to see it integrated into Firefox on Windows 11.
i think that the Firefox UI looks and feels great, but it looks a tad bit out of place when i enable the mica effect on windows 11 (since there are no transparency effects in Firefox), if the Firefox UI (tab-bar, context menus and baked-in webpages (like settings and new tab) ) has these transparency effects it would look so good