Uses git's internal storage so no files are added in your project. As you would do with commits and branches, you can push your bugs to the same git remote you are already using to collaborate with other people.
An addon plugin for Google Chrome and Chromium which detects HTTP error codes and asks if you'd like to see an archived copy at the Internet Archive instead. Also gives you the option to submit the URL you're looking at to the Wayback Machine so it can be archived.
github repo for a Firefox as well as a Chrome addon plugin that interfaces with Keybase. It adds Twitter checkmark-like icons next to the usernames of Keybase users on Twitter, only each icon represents a socnet they're on.