Brave. Sometimes qutebrowser.
If I have to pick only one then it would be Brave. I do use Firefox quite a bit though due to it’s container tabs and extensibility.
Brave Browser 
I was a big fan of Firefox from the very beginning. I ran it until they went woke and ran Brendan Eich out of his own company. As soon as he had Brave working, I moved over to it and have not looked back. Is Firefox important? It should be, but they did this to themselves. They are so woke, I won’t even use Thunderbird. I’ll just use a web mail.
I’ve been trying to make the conscious effort to give Falkon a fair shake here lately. But I cant seem to overlook the ad blocker will not work on YouTube and a couple of other places.
But does render sites really good. Quick and clean looking. especially in Plasma6.
But dude, I gotta have good ad block. Which is why I keep Brave open at the same time. Lol.
Brave nightly for everything except my YT channel.
For That and only that activity I use FF
What is the reason for a different browser for YT?
One of the greatest features of Brave is that you don’t have to watch YouTube ads. I convinced multiple friends that would typically avoid changes of any sort on their computer to switch to Brave solely for the reason that they didn’t have to watch YouTube ads anymore lol
Brave for me also, I used to use FireFox too but between what going on with the organization and and the absolute resource hog it it became I decided against installing it when I hopped over to OM.
Because all my private stuff goes thru brave.
Only thing that goes thrue FF is my YT chanell.
If im searching anything during my YT videos I use FF.
I do not want people to see my private saved tabs nor search history or anything.
My private life is private. My YT Is abut linux.
So you will only see Linux related stuff there, nothing more nothing less.
I use Brave nowadays and fall back on Firefox if for some reason Brave is not functioning as it should. I’m willing to try new browsers from time to time, since I came to the conclusion that moving away from what is considered the standard from time to time is a way for me not to get too complacent.
The only negative part about Brave in my opinion is that it is Chromium based and Google is still very much in charge of the source code, which in turn puts the rest of the Chromium browsers at the mercy of Google when they decide to do stuff such as go to war with adblockers.
I heard that there was some new browser that has its own infrastructure being developed, but I forgot the name of it. Pretty sure Lunduke has mentioned it more than a few times.
I think it was called the ‘Ladybird’ browser?
That’s the one. IIRC the author had been a leader on Apple’s Safari browser, burnt out and decided to make an OS for fun, then realised that it needed a formatted text widget and before he knew it he was back in the browser game.
Work: Brave, since I need a Chrome/Chromium-based browser and Brave seems to work the best for me.
Everything else: Zen browser.
Floorp
Brave and Firefox. I use a Pixel phone so I guess I sold out to Google a while ago. If only there was a true ungoogled phone
I switched to Vivaldi about 4 or 5 years ago, but I’m been thinking about trying to use Floorp more to see if I like it.
/E/ OS on a Fairphone 4 or 5. Works great. No Google. I believe Murena (makers of E OS) sell the Fairphone 4 / 5 in the US as well.