Neither servo rendering engine (like gecko), nor verso (an actual rust based web browser based on servo) are quite ready for prime time. But I'm hoping they will be there sooner rather than later. I don't use Firefox directly, but rather wrappers based on it, Librewolf for the desktop and Mull in part because I'm lazy (I prefer the ankerfox stuff and other to be done for me), and if I want to avoid chromium based browsers, dominating big time (MS browser edge is as well chromium base, electron is chromium in disguise, and now a days QT web engine underneath is chromium as well) well there's no option yet.

On the other side, nothing guarantees servo and verso (or whatever other servo based browsers in the future) will care about net free advocacy, neither user freedoms, just be concerned about being better technical solutions, :( But I still have high hopes as you might...

Just being a good technical alternative is not good enough now days, :(