I’ve been using Firefox since before it was even known as Firefox (or even Firebird). I use it exclusively due to ethical reasons and the fact that it’s just a great browser.
WinLinux 2000 -> Mandrake -> Red Hat -> Fedora Core -> Ubuntu -> Mint -> Arch … (break from Linux) … openSUSE Tumbleweed -> Manjaro -> Arch -> Debian sid -> Bedrock Linux (w/Arch and Ubuntu stratas)
Bedrock (my daily driver) allows me to pick and choose different components from different distributions and use them all together. It’s basically the best of all worlds.