HTTPS Everywhere:
Copyright © 2010-2018 Electronic Frontier Foundation and others
Licensed GPL v2+

HTTPS Everywhere Rulesets (src/chrome/content/rules):
To the extent copyright applies to the rulesets, they can be used according to GPL v2 or later.

Issue Format Bot (utils/issue-format-bot/*):
Copyright © 2017 AJ Jordan, AGPLv3+

The build system incorporates code from Python 3.6
Copyright © 2001-2018 Python Software Foundation; All Rights Reserved