I am running Firefox 119.0 installed from Flatpak on Fedora 38. My theme is set to "system theme" and I am using the "Sweet Dark" GTK theme on the Cinnamon desktop environment. (cinnamon-session 5.8.1) https://www.pling.com/p/1253385/ (From the download option select Sweet-Dark.tar.gz, not the v40 version) The expected behavior is that when a window is not focused, the maximize, minimize and close buttons become greyed out to reflect the window no longer being focused on. Instead - If I am focused on another window or on the desktop, the buttons still appear as if the Firefox window was active. I would need to hover my mouse over them for them to update and appear grey. This also is the case in the reverse, where the buttons appear as if the Firefox window is not being focused on even though it actually is. Since I tend to have multiple windows open where I type things, this can make it a bit confusing when I try to type something in Firefox because I see the buttons make it look like the window is active, but I was actually focused on something else. Here is a video example, with kate being used as an example of what expected behavior should be like. https://0x0.st/HtS6.mp4 I prefer to use the Flatpak version of this. While I tried this on the recent RPM release, I noticed the same issue there as well.