[BuckRogers]

I'm an 18+ year non-stop Firefox user and have always routinely checked out the competition (once every few years). Just did my latest comparison last night in fact. What I appreciate about a browser has changed over the years, I'm less of a privacy expert or some sort of Gecko diehard, and more about features and performance.

Brave- no dedicated search bar option (important for privacy / prefetching and not having to continually retype your search query). Didn't get to mobile support and crossplatform sync.

Opera- dedicated search bar, with no way to set a hotkey to focus it. Disqualified as that makes it a non-power user's browser for me right off the bat. This browser's closed source and Chinese ownership does give me pause.

Vivaldi- dedicated search bar and hotkey (yay!), but no way to sync tabs with iOS.

I've already determined for a while now that Firefox (best on features) and native browsers, Edge and Safari (best on performance) were my 3 browsers of choice, and that remains unchanged. Edge on Windows 10 is truly great, and has a decent start at sync, even if it doesn't come close to how well Firefox does there. It just needs fleshed out more.

To answer your question on what the sell is, it's really dependent on the user, and native browsers have huge advantages (most people should probably just use Edge/Safari IMO), but I see Firefox as the only non-native browser worth using due to the best-in-class feature set. I'm not going to draw this post out further detailing all of them, but it wouldn't be hard for me to demonstrate how much Firefox outclasses the competition there. It's a very mature browser.