I would use Firefox on Android but I’m waiting until the security is on par with Chromium such as having internal sandboxing and site isolation.
Also since Firefox doesn’t have a WebView implementation, it has to be used with the Chromium based one so it doesn’t make sense for me to use two browser engines.
Aurora Store isnt needed because of Graphene’s Sandboxed Google Play Services.
Obtainium app is best for installing APKs from github, fdroid, etc because of the auto updates.
My favorite feature of GOS is the scopes for contacts, storage, and MTE support on Pixel 8