Update: ChromEdit Plus can no longer be installed because it's not signed, please see You too Can Improve Firefox.
For a long time I have been wanting to switch to Firefox as my main browser. I haven’t done so before today because I didn’t like two things: The font-size of the address bar, and having a seperate search box.
Today I’ll show you how to fix these issues.
Fix Address bar font-size: Install the ChromEdit Plus addon. Then, under Tools > ChromEdit Plus > ChromEdit add the following code to the userChome.css:
#urlbar { font-size: 16px; }
Press the Save and Restart buttons. Afterwards you can disable this addon.
Remove the search box: right click on a toolbar > Customise. Drag the searchbox into the Customise Toolbar dialog to remove it from the UI.