Me, I have a low threat model so I mainly try to stay away from proprietary stuff when possible (Chrome, Edge ect) I use an eclectic mix of browsers.
I use Vivaldi (I know it's not entirely FOSS but I like the customizability of it), for my amnesiac browsers I use Firefox Focus on Android, and LibreWolf on PC, and for when I want as much anonymity as possible I use Tor with Orbot active routing traffic to Switzerland.
I used to use Brave Browser a lot because I like the user interface but I kinda got turned off by all the crypto stuff they've been peddling. And as far as I know, Bromite hasn't been updated in quite some time (please elighten me if I'm wrong about that I've been out of the loop for a while) , and I was weirded out by the developer's statement "I'll get around to it sometime."
Mull is great but very slow to search imo, when I search for something it takes a long time to load. Or it takes a long time to load a website. It could be internet speed but other browsers work just fine,and I've tested Mull on other WiFis.
I sometimes also use DuckDuckGo but the search results are so bad that I just find myself searching google to find what I want. No offensive if anyone uses those I personally just haven't found much use out if them.
So what browsers do you use for privacy and security?
Edit: Sorry for the long post and edited for clarity.
A lot of people are talking about the privacy aspect (like you mention in your post) a lot better than me, so I wanted to share the main issue I've had with ChatGPT. It's an idiot. It can't follow basic instructions and will just repeat the mistake over and over again when you point it out. It's uninspired and uncreative and will spit out lame, great value brand names like "The Shadow Nexus", "The Cybercenter", "The Datahaven". I used to be able make it give good names when giving it example names but doesn't work anymore. I'm writing cyberpunk fic, and I needed help with a hacker group name, and it came up with the Binary Syndicate which is pretty good. Now it comes up with "Hacker Squad", "The Hacker Elite", "The Hackers". I don't want it to write an entire book for me, but sometimes I need help with scene that require more technical knowledge than I have. It's prose was really good when you fine tune it a little. Now it's flat, bland, and boring. I asked it to write a scene about someone defusing a bomb and it basically was a two sentence scene that explained nothing on how he defused it. I asked it to make it longer and explain how he defused it and it saw "He opens the case and utilizes a technique known as 'wire tracing'. He traces the wire and cuts it and the bomb is defused. The hacker is so relieved." See how flat that is? How mechanical? I use Claude for creative writing but it's not much better.
Claude is so censored that writing anything that sounds even nonoscopically criminal it freaks the hell out and lectures you about being ethical. For instances it wouldn't help me write a scene about a digital forensic analyst at the FBI wiping a computer (because it encourages harm). So you can only imagine how it reacted when I asked it for help writing about my vigilante hacker character and my archeologist posing as a crime lord smuggler secretly dismantling black market trades in the middle east. You have to jailbreak it (which is a little bit less hard than hacking the Pentagon!) and eventually it goes all love guru on you and starts monologuing about light and darkness and writing inspiring uplifting tales blah blah blah.
Honestly, what I'm saying is that ChatGPT is pretty dumbed down, but I've heard of a lot of people who've noticed no difference. You could be one of them. If you're using it for creative writing, use Claude and good luck with the prompt engineering attempting to jailbreak it.