The google custom search - perhaps it went there by itself?

[Alan Pope]

2009/7/27 Sebastien Bacher <seb128 at ubuntu.com>:
> Wouldn't it make sense to rather try contacting the maintainer or the
> ubuntu mozilla team about the issue or to open a bug on launchpad so you
> can get a reply from the people doing the changes?
>

..or read his blog post about it :)

http://www.asoftsite.org/s9y/archives/162-What-is-this-Multisearch-thing-in-my-Firefox-about.html

(which I can see Vincenzo already has, and has indeed commented on it
[assuming that's Vincenzo]).

Cheers,
Al.