This. I fully switched over to Safari a few years back, but then Apple killed/locked down extensions. I tried out all the options and finally settled on Edge, but I often rotate over to Firefox to see if it's good enough to use full time. It's hasn't been yet, but fingers crossed it gets there. I do really like it overall.
I tried Edge since my company is full on Office 365 and its now the company default browser on Windows. Its not bad, but I feel like Microsoft was updating it almost weekly and just moving stuff around. I know some of that is Google pushing things like the downloads that moved from the bottom, where I like it to the top right and now it drops down and blocks my view. Ctrl-H for History no longer works either...and change for change sake.
I like Firefox for little reasons I probably only care about.
If I like a picture on the Internet, want to make it my wallpaper, you can do that with a right click in Safari, Internet Explorer or FireFox. With Chromium browsers you need to download the photos, then go through preferences to change it.
Or we have lots of internal stuff I get to in IT, like firewalls etc that have self signed certs, which is just so much easier to deal with in FF. With Edge/Chrome I have to click through that bs everytime.
Also FF and Safari are the ONLY browsers that truly stop Auto Play. I have tried with Chrome and Edge to find and extension that does this but some stuff always gets through.
I absolutely love the Picture in Picture video player in FF. I am working on something and listenting to a YouTube video that I want to see the video from time to time, I can have it playing down in a corner at whatever size I want while working.
I think FF has the best Bookmarks management features as well. Safari is badly lacking here and even Chromium based browsers are behind FF.
Lastly FF is on every OS I have to use..Mac, Windows and Linux.