Can't log into Facebook using Tor. They want to install software to 'clean' your computer. I've run 3 different malware programs of my own, plus, I logged into Facebook using another browser and account name. So it's not my computer. Firefox is the default browser for Tor. Is it possible to use another browser with Tor installed?
Edit: It's possible to use any TCP-based application that supports SOCKS proxying through Tor. That doesn't mean you should.
It's not possible to use a different browser with Tor. The Tor Browser is a heavily modified version of Firefox that has a number of security enhancements that ensure all browser traffic is routed through the Tor network.
One possible solution would be to use Facebook's Tor Hidden Service directly, rather than using the clearnet site. The fact that Facebook have an official .onion site shows at least some intent on supporting the Tor network and its users.
(Here's an official Tor blog entry from when Facebook enabled this service: https://blog.torproject.org/blog/facebook-hidden-services-and-https-certs)
Yes, it is possible to use any browser, that supports SOCKS and/or HTTP/HTTPS proxies with Tor : the browser alone will not protect your privacy - any browser can run a plugin or an XML-HTTP-REQUEST or similar stuff to leak out data. So - your problem is that an Exit node you're using is blacklisted by it's IP. change a tor circuit in any way suitable to you : tor button, telnet controllers, e.t.c... but the Facebook has an onion entry address, officially maintained at https://facebookcorewwwi.onion