Close Left Tabs.
Add "Close Left" Button into toolbar.
The tabs to the left of the current tab will be closed.
Close Right:
https://chrome.google.com/webstore/detail/close-right/npemobdkdcknhfaiioheeffincgpgafj
Close Others:
https://chrome.google.com/webstore/detail/close-others/jlkpafdhmdhiahnmcmjejmlidghcobeb
