[gentoo-user] [OT] What's up with Firefox?

[Peter Humphrey <peter@humphrey.ukfsn.org>]

Sorry to be a nuisance but I can't think of where else to ask.

On the website I run I have a link to our Twitter profile (or whatever it's 
called). This is the link:

	https://twitter.com/TideswellMVC

If I examine the page using the web host's file editor I see exactly that, 
yet if I press CTRL-U in www-client/firefox-17.0.7 it shows this:

	https://twitter.com/#%21/TideswellMVC

and if I click the link in the main window I'm asked for a login and 
password.

Trying the latest Windows version of Firefox in an XP virtual box I get the 
unaltered link. I can't tell what version that is because "About Firefox" 
merely checks, then tells me I'm up to date.

Incidentally, I have a web server running on my LAN with an identical copy 
of the site. Using that as the target, rather than the public version, gives 
the same results.

I haven't used JavaScript anywhere.

What's going on here?

-- 
Peter