Tired of having Google as the default search engine in Firefox? Maybe it is another search engine’s turn to be on top?! If you feel the urge to dethrone Google as the default search engine for your Firefox search box – this is how you can get it done:
In your address bar, type in: “about:config”
Inside of the filter search box, type in:
Double click that entry (or right click and choose “Modify”) and then type in the name of the search engine you wish to have as the default search engine. It must be one that you already have installed and also make sure you type in the name correctly.
Now if you type in “Yahoo”, restart Firefox and when your browser comes back up you will see the red Yahoo “Y” and Yahoo as your default search engine.