I use Firefox for just about everything. More specifically, I use a couple privacy-oriented Firefox forks. I like Librewolf as my daily browser and Mullvad Browser as my "view-once" browser. On mobile I primarily use Mull.

Librewolf is great for me because it removes some of the Mozilla fluff that I don't use (Mozilla VPN, Pocket, etc). A lot of people would likely prefer using the arkenfox.js user configurator simply because it'll allow you to keep up to date with Firefox's native update installer.

Occasionally I'll use Brave on desktop- I find that a Chromium browser not using my strict uBlock Origin ruleset is generally more ideal for college and work-related use. Your mileage will vary considering your use case, but there's no shame in having multiple browsers that you use for different things.