In terms of rendering capability, Abrowser is functionally equivalent to
Firefox 6. However, its user-agent string reads like:
Mozilla/5.0 (X11; Linux i686; rv:6.0.2) Gecko/20110916 Abrowser/6.0.2
While I think browser sniffing among the stupidest trends in web development,
the sad truth is that there are sites that refuse to allow any browser that
doesn't have a well-known name like "Firefox" or "IE." Case in point - my ISP
whitelists IE, Firefox, and Safari and blocks every other browser.
The obvious workaround (and what I eventually did) is to install a user-agent
switcher, but I believe this is too much to ask non-savvy users. I think it
would be beneficial to alter the user-agent string to include Firefox so as
to placate ill-educated web developers. Debian has done this with Iceweasel;
see http://www.useragentstring.com/pages/Iceweasel/