Firefox now opens with Crawler as the browser how do I return to normal firefox home page withthe google search box?

When I opened firefox the search page just showed Mozilla firefox and had a search inptu boxwih google underneath to show the search engine being used. Suddenly I opened firefox and the page is showing lots of text and is Crawler.com. I have tried to change it back to firefox as it was before but without success. I even uninstalled and reinstalled forefox but it still opensCrawler.com and not mozilla firefox.
Can anyone explain why this has happened and where Crawler.cm came from as I have not downloaded any software with the name crawler, and how can return to the set up that I am familiar wih and prefer.

Try resetting your homepage. 
http://support.mozilla.com/en-US/kb/How+to+set+the+home+page

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Firefox now opens with Crawler as the browser how do I return to normal firefox home page withthe google search box?

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