Removetabs is a firefox extension to remove tabs on the left/right side of the selected tab.

This extension adds ‘Close Right’ and ‘Close Left’ functions into the pop-up menu.

It is very easy to use, just right-click on a tab, then click on ‘Close Right’ to close all the right-side of the selected tab.

With this extension, you no need to close the tabs one-by-one anymore. It lets you have more control over your web browser.

Download the extension from https://addons.mozilla.org/firefox/4227/. For more information, you can visit the homepage of this extension (in Japanese), or you can get the translated homepage here.