Is that the search bar on the about:home page?

You can try to reset the browser.startup.homepage_override.mstone pref to the default on the about:config page and close and restart Firefox.

To open the about:config page, type about:config in the location (address) bar and press the "Enter" key, just like you type the url of a website to open a website.
If you see a warning then you can confirm that you want to access that page.

• Use the Filter bar at to top of the about:config page to locate a preference more easily.
• Preferences that have been modified show as bold (user set).
• Preferences can be reset to the default via the right-click context menu if they are user set
• Preferences can be changed via the right-click context menu: Modify (String or Integer) or Toggle (Boolean)

Thanks! Your reply did the trick! Now it when I hit the search button it sends me to google instead of bing.

This did not do anything at all to help me