Interesting..why I didn't find those pages before today..thanks Meamish.

It was easy:
start Micro-B
write address bar: about:config
search keyword.URL
choose it and press enter
write adrees bar: http://frogfind.com/?q=
press enter
restart Micro-B

Remember if you click results of Frogfind, they are translated to plain text only html. So if you want see original version of result page you have to cut off start of url.

Interesting thing that Micro-B still says Google search and logo, but these cosmetic thinks and it might hard to get out.