It can be easily integrated with the newest version of Firefox.
Add custom websites to the 'More' tab on Google Search Specially designed for Firefox users, this addon lets you specify any websites you want to browse when using Google Search, such as Amazon, Twitter, YouTube or Wikipedia. To overcome this issue, you can use Google Search Plus. Unfortunately, the 'More' feature is rather limited since it doesn't give you the possibility to include your favorite search domains. For instance, you can look only for books or flights. There's also a 'More' button right beneath the search bar, which runs searches on specific platforms. Google Search has many nifty functions that not many users know about when it comes to performing accurate searches using advanced filters, such as language, last update time, reading level, and file type.
