My bank doesnt let me use Iceweasel to bank online. The good news is that its easily fixed, all you need to do is pretend to be running a supported browser.
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Web browsers identify themselves to web servers by sending user agent strings. My banks internet banking site was kicking me out because what its seeing (Iceweasel) isnt on its white list of supported browsers. Firefox is however and the thing is, Iceweasel is Firefox by another name. All I had was get Iceweasel to lie about who it was, a technique called user agent spoofing.