Seems like a huge security issue -- and also a very annoying user experience -- that Firefox mobile will just automatically open any website provided by a nearby NFC card without any user interaction. I have a card in my wallet with an NFC web address and often I'll get my wallet out to get my credit card to pay for something, then suddenly in the middle of checking out Firefox grabs the NFC data and suddenly I'm on a completely different website! And then I hit back and it closes the browser, and I reopen the browser and it's on a different tab so it takes a good 30 seconds to get back to where I was, and then sometimes it all happens again. The first time it happened it took me several minutes to even understand what was going on -- I was resting my phone on top of my wallet in my lap, and no matter what I tried to do Firefox keep pulling me back to this other website every few seconds and I could not figure out why!
Before opening an NFC-provided address there should probably be a pop-up to confirm. Would be extra nice if that popup included some option like "ignore for five minutes". Very strange to realize that anyone can force my browser to go to any website without my knowledge or consent if they manage to get close enough...
