BroswerFruit provides you with a customizable toolbar that allows you to access a list of websites with just one click. You just need to use a mouse gesture to open the toolbar with the previously configured websites.
The toolbar can be activated by holding the right mouse button and dragging the cursor to the right. You can personalize the toolbar from the address bar button.
Note: In order to install the extension you need to drag and drop the downloaded file in the Extensions tab.