Coming from PaleMoon which had dropped ARM support, it took quite some time, but it is kicking again and the classic browser is a good companion on the Raspberry!
It runs surprisingly good and you can even watch youtube videos. Obligatory screenshot as proof:
In fact, this same post was written on my RPI3. While I was able to fix neon support in graphics, I have issues doing a cortex-a53 optimized build. I also have issues compiling on the newer RPI3 which as a newer Raspbian/RpiOS, with similar errors. However, seeing ARM support back is a good feeling .