We hate to see you go, but if you want to uninstall the extension follow the steps below. 

First, you will want to be within your safari application. In the top left corner next to the black apple you will want to click on 'Safari' and then select 'Preferences'. 

After the 'Preferences' option is selected you will see the 'Preferences' box and along the top there will be an option for 'Extensions'. Once that is clicked you will have the choice to uninstall/disable the extension from your browser.