I use Firefox Mobile as well but to be fair extension-support is flakey. A lot of times I install an extension that doesn't work and nothing indicates whether it does or doesn't. Also the extensions store doesn't indicate whether and extension is mobile friendly or not.
Oh man plugin support on mobile, this is a game changer for me. If only Firefox supported 2fa with an authenticator app I would have no hesitation using Firefox as my main browser.
