Default search engine (change) # click on the favicon of the current search engin on search bar # scrool to bottom, click on ":Manage Engines" # grab the engine you wnat and move it to the top positiion, that is then your default search engine. You probably were referring to changing the default at the Location Bar, but first make sure you get rid of the Yahoo Toolbar, and keyword.URL is in the instructions,. ''Yahoo Toolbar messes up Location Bar Search'' '''Remove the Yahoo Toolbar''' # "Ctrl+Shift+A" (Add-ons Manager) # Select Puzzle piece on left-side for Extensions List # Find "Yahoo Toolbar" and click on "Uninstall" button, and restart Firefox. ''(if you really need to keep the Yahoo toolbar, you can hide the toolbar instead with customize, and still change all the search defaults as below)'' '''Then to fix the default search engine''' used at the Location Bar, change the value of '''keyword.URL''' in '''about:config''' to one of the values shown in [http://kb.mozillazine.org/Location_Bar_search#Location_Bar_search_.28external_-_search_engine.29 Location Bar search] at MozillaZine. * Google Search (Google search results page)<br>'''http://www.google.com/search?ie=UTF-8&oe=UTF-8&q=''' # type in '''about:config''' into the location bar (in a new tab) # if the warning message nonsense comes up ''uncheck'' the box '''before''' dismissing the dialog message # '''filter on keyword''' # right-click on '''keyword.URL''' and choose "modify" then paste in the Google search engine string of your choice. # '''filter on defaulturl''' # right-click on '''browser.search.defaulturl''' ''(if it exists)''and again choose "modify" then paste in the Google search engine string of your choice. # '''filter on ytff''' # right-click on '''yahoo.ytff.search.popup_src''' ''(if it exists)'' and again choose "modify" then paste in the Google search engine string of your choice, if adventurous might see if "reset" would remove and see if gone in next session (well not for those keeping the extension). --used in https://support.mozilla.com/questions/850287 '''Avoiding the problems:''' Many software installations contain additional baggage known as crapware. The Yahoo Toolbar is packaged with Java [http://imageshack.us/photo/my-images/266/javainstall.png/ picture] More information on ask.com, Yahoo Toolbars which involve extensions, not just changes to the home page. * http://kb.mozillazine.org/Problematic_extensions * Uninstalling toolbars - MozillaZine Knowledge Base<br>http://kb.mozillazine.org/Uninstalling_toolbars '''More information on configuration variables''' available in [http://kb.mozillazine.org/About:config_entries about:config entries] and for users not familiar with the process there is [http://kb.mozillazine.org/About:config about:config] (How to change).