Good question. Other than Firefox, Webkit/Blink based browsers are pretty much the only thing usable on the modern web without crashing. That leaves ungoogled Chromium, which unless you're compiling it yourself (good luck) means just blindly trusting some random internet person for binaries. There's really no good answer at this point.
Worse: even if the person (or organization) providing the binary is well-meaning, they would need some serious resources (mostly programmers) to provide security updates quickly enough.
The least resource-intensive way to provide attack-resistance near the level provided by Google's Chrome team would probably be to notify the user when a vulnerability is disclosed so that the user can either switch to Chrome or restrict their browsing to safe sites till the binary provider can get a security update out.
I know of no one doing that or providing timely security updates however except Google, possibly Opera, possibly Brave and probably some day soon Microsoft.
I would consider IceCat, but it looks like development has fallen behind Firefox considerably.
I mean no offense by this but I consider myself a privacy wonk and that website is a bit too tin foil hat even for me.
I think we're in a bad way as far as choices go for browsers these days, but Firefox seems like the best of a bad situation to me. If people are still concerned, they should take a look at the changes made to Firefox for the Tor browser.
I like Icecat (annoyingly not in the Debian repos).
I've also started to make use of text browsers. Links and Links2 are two that I use. Links2 is a nice halfway option as it will support images too.
I find them great for websites where I want to read info, but the interface is ironically designed to make that harder than it should be. News sites are a perfect example. Text browsers turn them from bloated billboards back into a readable format.
I don't think anyone has mentioned Opera yet. Why? It's quite a bit snappier than FF imo, and has extensions like uBlock Origin/HTTPS Everywhere/Privacy Badger available (and the ability to install Chrome extensions).
Edit: I know it's chromium-based, but still wondering!
The collect money on someone's behalf, without that person knowing. It's a scam. It would be like me taking money on behalf of you. Only I wouldn't tell you. And now someone thinks they are paying you by going through me.
Blocking ads and depriving publishers of income is a scam. You are stealing from content creators. BAT gives more revenue to content creators than Google ever would.