I’m mostly a lurker, but certainly plan to stay. I probably will use Reddit occasionally, but that usage will be significantly reduced and limited to desktop use only as I have no interest in installing the official Reddit app. Too many web searches lead back to Reddit posts for me to drop Reddit completely.
I use Firefox because I can use the full version of UBlock Origin, and UBlock Origin also works on the mobile browser.
I also make heavy use of the extension Multi-Account Containers for signing in with different accounts for the same service at once.
Lastly, I prefer the UI for Firefox over anything else.