CustomizeGoogle is a great Firefox extension I’ve recently started using. It does exactly what the name suggests by allowing the user to set many Google related preferences. Check out the two minute movie that shows how easy it is to install and configure.
The CustomizeGoogle web site describes the extension as
“CustomizeGoogle is a Firefox extension that enhance Google search results by adding extra information (like links to Yahoo, Ask.com, MSN etc) and removing unwanted information (like ads and spam). All features are optional.”
My favorite features CustomizeGoogle offers is the ability to enforce access to Google web sites, such as Gmail and Google Reader, through a secure https connection. You can also easily remove all the Google ads from the search engine, gmail, Google Groups, etc.
You can read more about it at the CustomizeGoogle blog.