In your browser, be it Google Chrome, Firefox, Safari, or Opera, all you have to do is to right-click on any tab and you will be able to select the option “Close tabs to the right”.
This will close all the tabs at the right of the current tab. Alternatively, you can also select the option “Close other tabs” which will then close all tabs except for the current one. Note: The “Close tabs to the right” feature is only available in Firefox 24.0 and above. It is not available for Safari though.