Comment Protector
Extension Actions
CRX ID
cabjdnbkkhahjifkjgkjdgfocmalbgik
Description from extension meta
Protects you from accidentally closing in-progress code review comments
Image from store
Description from store
Currently enabled on GitHub pull requests (github.com) and Chromium code reviews (codereview.chromium.org).
Source code at https://github.com/kalman/chrome-extensions/tree/master/comment-protector