I use Pale Moon for nearly everything. At least 99% of the time. Every once in a while I am forced by some website to use IE or chrome. Why bother with Firefox?
I used Pale Moon for a few years and loved it but went back to Firefox when my three favorite security add-ons (Ghostery, AdBlock Plus, and NoScript) would not update or work.
Pale Moon didn't keep up with the changes and became hard to use. Have they made the proper updates? I would love to go back to them.