Firefox has multiple compelling reasons to use it:
Sync[1] only what you allow, bookmarks/history/extensions/etc
Containers keep sites separated nicely[2]
Tree Style Tabs[3]
uBlock Origin on Android[4]
Open Source since 1998!
Not based on Chromium
[1] Be wary of sync on a fresh Linux install, it might sync the default bookmarks and merge them with your own. Not a huge deal but definitely an annoyance.[2] https://support.mozilla.org/en-US/kb/containers
[3] Tree Style Tabs requires several extra steps to remove the tabs at the top of the window. You have to set toolkit.legacyUserProfileCustomizations.stylesheets to true, then create a "chrome" (lol![5]) directory in your profile and add a userChrome.css file to it. https://github.com/piroor/treestyletab
[4] uBlock Origin on mobile web makes a massive difference. You can even use the same rules that modify the style of the page you're viewing, such as setting HN to a dark mode via:
news.ycombinator.com##html:style(filter:invert(95%) hue-rotate(200deg); background: white)
[5] I'm aware that the Mozilla UI was called Chrome at one point, not sure if it still is.