If you’re like me you prefer to use the same one throughout all your devices, but maybe you’re not like me.
Poll list compiled from the “Usage share of all browsers” chart found here, going just down to “AOSP” (Android):
I use safari on my phone and iPad. Firefox on my desktop and laptop. (I voted Firefox)
Firefox, all the way. Lots of extensions.
Chrome, I want to like it but their updates tend to break stuff.
Ditto. Safari was the only option for the longest time on my iPhone and iPad, so I’m still using them. I’ve been using Firefox on my desktop and laptop Macs for even longer (more than a decade), as well as on my desktop PC at work.
With that said, I have started to use Chrome a bit more frequently on my desktop computers. Some websites seem to work better on it (like the various Disney websites).
I’ve used Chrome since it came out like 10 years ago, but just yesterday I switched everything over, or rather back, to Firefox on all my computers. On my phone I deleted Chrome and am now using DuckDuckGo’s browser.
I’m done being an involuntary data collector for Google. I know, it’s certainly way too late at this point, and I’m still using Gmail and Google Drive so I’m sure they’re still all up in my shit.
I picked “different browsers on different devices”.
On my laptop at home I use Chrome, although some sites seem to work better in Edge.
At work we’re not allowed to install Chrome, so I use Firefox for most things, although there are a few internal websites that require Internet Explorer.
On my iPhone I use Safari just because it already there and I don’t feel like installing a different browser.
I also switched to firefox as I am not happy about how google is planning to hobble adblockers in chrome.
I’d been on Firefox for years, but I’ve been spending more time on Twitter lately, and Chrome is more Twitter-friendly, so I’ve switched to Chrome in the past year or two.
It took me forever to switch to Firefox, since I’m a web developer and way back when, Explorer seemed to be the break-y-est so I had to make everything work in Explorer so I just used that.
I’ve been on Firefox for probably about a decade, though. Chrome never did it for me. I felt it was too resource-heavy.
Firefox has the AdBlock extension. Firefox has really nice Web Developer tools built in (so does Chrome but they’re slightly different than FF). I really like Firefox’s Sync (which is probably also in Chrome) where I can have bookmarks and logins shared across all my devices.
Even cooler is Firefox’s “send link to device” so I can be reading a website on my desktop and send it to my phone. Or viewing a YouTube video on my phone and send it to my TV computer. Neato!
Firefox. Used to be Chrome. I can’t remember why I switched from Chrome but SDMB search would find it since I think I documented my reason right here at SDMB.
Firefox is a horrid memory pig, so I’d love to switch back. (Or is Chrome just as big a pig?) But switching back might be bothersome. 
ETA: What I most miss with Firefox is Chrome’s History. On Firefox it takes several clicks just to get to a much worse History, AFAIK.
I use Chrome mostly, including for GMail. But late at night, when surfing for things I’d rather not have in my Google profile, I use Firefox with a (I hope) completely separate YouTube identity.
Chrome for work. Recently started using Edge at home.
I use both Firefox & Chrome both at home and at work.
At work, I use Chrome for work stuff and Firefox for personal stuff.
At home, I have some sites I open in Firefox and some I open in Chrome. Mostly because I have a stupidly old computer and some sites will start consuming memory, so it’s easier to have those sites open in one browser (Firefox, out of habit more than anything), so if they go off the rails I can just kill the whole program. Chrome gets the web sites that aren’t as likely to be an issue, and my etsy store.
Chrome on my laptop, Firefox on the Mac, Safari on the iPad.
I’ve been using Chrome for a while, since I started telling it all my passwords, but with the steady increase in cookies and tracking and google hegemony I’m thinking of moving back to Firefox.
I voted “I use a browser not listed here”. My main browser I use is Waterfox, a fork of Firefox which still supports old extensions dropped by Firefox(when Firefox version 57.0 came out with a new browsing engine.) I was using Firefox until they changed it.
I also use Chrome mostly to access Facebook and Twitter.
Incidentally I currently have 13 different browsers installed on my PC; I installed different ones to experiment with which ones worked best and never got around to uninstalling them:
Chrome
Comodo Dragon
Comodo Icedragon
Firefox
Flashpeak Slimbrowser
Internet Explorer
K-Meleon
Lunscape
Netscape Navigator
Palemoon
Safari
Seamonkey
Waterfox
Voted Firefox. I use Safari as a secondary browser sometimes on the main computer, and also use Safari on the ipad, but I don’t use the ipad all that much so if I’m online I’m probably in Firefox.
Firefox on my desktop and Opera on my phone & tablet. Mobile Opera does a better job of and blocking in my experience and I like its clean homescreen with the “speed dial” buttons more than I like Firefox or Chrome. But, on desktop, I like Firefox’s look more and am more successful with ad blocking.
Firefox and has been since the some of the very earliest versions.
I use classic Opera for most uses. But it doesn’t always work so I then use Vivaldi which is being developed by ex-Opera folk. Chromium engine but something of an original Opera-like feel.
It recently added something almost, but not quite, like tab minimizing for the current tab. If they ever get around to real tab minimization, then that’ll become my main browser.