Microsoft's IE7 Search Box Bugs Google
Google didn't write Firefox. Microsoft did write IE7 AND MSN Search. If Google wrote Firefox and put their search in, that would be hypocritical. That's not the case.
This is another instance of Microsoft using its dominance in one market to force its way into another market. They used Windows to force themselves into the browser market, and now that they dominate the browser market they're using it to force themselves into the search market.