Helps you to can usual code review comments for repeated use. A lot of them will need the same answer, and your wrists will start hurting from all the switch-to-edit-copy-pasting. This extension helps with that.
Install it from the Chrome Web Store
The extension adds a little button inside crucible comment editing view, that allows you to choose one of the existing canned responses, and insert it in the current comment.
The extension comes with a few default canned responses, but you can edit them and add your own! In the dropdown, press the edit link, and there you can add more canned responses and also change the auto comment option on/off.
For each canned response you can set it up to be also a quick response reply. It will come up along side existing comments.
Thanks to Monica Dinculescu, as this project is crucible version of her implementation of canned github responses.