gnome-shell-extension-mpris-indicator-button VS AdwCustomizer

Mpris Indicator Button is pretty cool too, but seems to lack a hot key to display it.

I also use the mpris indicator extension myself and that particular dev uses Fedora (or sometimes Ubuntu), and they've said in the past they can't update the extension until Gnome 43 hits, so since Fedora is still delayed to mid-November, that extension won't be officially updated just yet. But if you check their GitHub they have a "crude" master update for Gnome 43 you can use if you really want to, but just know it's not release ready yet.

Extensions: Blur my Shell, Tray icons Reloaded, Clipboard indicator, GSconnect, MPRIS Indicator Button, Night Theme Switcher, Color Picker

There are at least two extensions which do that (for Gnome 40): MPRIS Indicator Button and Media Controls.

Since Waterfox is based on Firefox and the MPRIS implementation of the latter seems optimal I suppose something is "missing"(?) in Waterfox sourcecode, I use the "MPRIS Indicator Button" GNOME shell extension and it's always worked flawlessly with Firefox but it never did with Waterfox .

After in-team Round 1, we selected those names and we want GNOME community to select a name for our app

OK, I opened a new discussion for it and also joined the matrix room.

Install AdwCustomizer. Choose your color scheme and apply it (some applications may require you to log out first).

I think recoloring (color overrides defined by the user) is also important, which adwaita supports internally, but GNOME doesn't have this functionality exposed, you have to use AdwCustomizer. https://github.com/ArtyIF/AdwCustomizer

right access to what? could you please copy the command output? you can also create an issue in the project's github