Waterfox
Waterfox (so far) seems to be the answer, at least for me. It keeps the more useful improvements Firefox makes, removes the Mozilla telemetry, and will support existing extensions as long as feasibly possible. Pale Moon is so far behind, it doesn't seem like a reasonable alternative and the pace of development seems to be on a geologic timescale, at least it isn't a reasonable alternative for me.
Just a happy Waterfox *user* who has nothing at all to do with any project and hates Google with a passion.
YMMV of course