- continued support for manifest V2 (primarily because ublock origin would stop working if forced to V3 only)
- the firefox address bar is way smarter for any given string i type in than chrome's. it's ability to surface the most relevant deeplinks from my history, vs top level site, vs perform a web search, is night and day difference from the randomness that other browser search bars offer.
- I have the opportunity to use Zen (a Firefox fork) [0] and it's 100% interoperable with my vanilla Firefox instances across devices -- i can even send tabs from my Firefox Nightly on Android to my Zen instances on Windows or Mac. BTW Zen has vertical tab support, (more) first-party multi-profile support, and preserves the address bar behaviors of vanilla Firefox.