bug#44678: Set a Firefox user agent for our Icecat build

[Maxim Cournoyer <maxim.cournoyer@gmail.com>]

Hi Arun,

Arun Isaac <arunisaac@systemreboot.net> writes:

> Hi,
>
> Many sites---jitsi among many others---don't work properly when they see
> an Icecat user agent. Instead, when the user agent is set to a Firefox
> user agent, these sites work as expected. Users can do this manually by
> installing user agent switching extensions such as uaswitcher, but it
> would be much better if our Icecat package, by default, came with a
> Firefox user agent, and everything worked normally without any user
> intervention.
>
> This bug report arose out of a discussion on help-guix. See
> https://lists.gnu.org/archive/html/help-guix/2020-11/msg00082.html
>
> I would normally volunteer a patch, but building Icecat takes too long
> (> 24 hours) on my slow computer. It would be nice if someone with a
> faster build machine handled this.

I thought the default user agent was already that of Firefox for Windows
(!), purportedly to make it less unique (thus making fingerprinting of
browsers/users more difficult).

Isn't it the case?  I changed mine long ago so I don't remember (to
please some broken site).

Thank you,

Maxim