Firefox is totally doable on that much RAM. Not going to be pleasant, but usable. You want to strip down as much resource usage as you can: inside Firefox throw in uBlock Origin and Tab Unloader; outside Firefox use a stripped down desktop like XFCE or just a straight low resource window manager with no desktop environment (I was a big fan of WindowMaker back in the day).
Firefox is totally doable on that much RAM. Not going to be pleasant, but usable. You want to strip down as much resource usage as you can: inside Firefox throw in uBlock Origin and Tab Unloader; outside Firefox use a stripped down desktop like XFCE or just a straight low resource window manager with no desktop environment (I was a big fan of WindowMaker back in the day).