Do you have some search engines on Firefox search bar which you never used. Keeping them in search bar is of no use, it is better to simplify it by removing search engines. Here are steps to remove searchengine just follow them:
1). Open Firefox and click on a triangle icon on left of search engine toolbar.
2). Click on Manage Search Engines.
3). It will open a window which contains all installed search engines, Select search enginewhich you want to delete.
4). Click on remove.
5). Click on OK.
Its done.
Close your firefox and reopen it to see the changes.
