On your Chromebook, open Chrome.
At the top right, click More(this is the 3 dots in the top right corner), then select More Tools, then Extensions.
Make your changes:
Turn on/off: Turn the extension on or off.
Fix corruptions: Find the corrupted extension and click Repair. Confirm by clicking Repair extension.
On your Chromebook, open Chrome.
At the top right, click More(this is the 3 dots in the top right corner), then select More Tools, then Extensions.
On to the extension your want to remove, click Remove.
Confirm by clicking Remove.