Click the Chrome
on the browser toolbar.
Click the trash can
icon by the extension you'd like to completely remove.
A confirmation dialog appears, click
You can also temporarily turn off an extension by disabling it on the Extensions page:
In the top-right corner of the browser toolbar, click the Chrome menu icon Chrome menu.
Select More tools > Extensions.
To turn off an extension, uncheck the Enabled checkbox next to it. To turn on an extension, simply check the box.