:no_entry_sign: UNMAINTAINED :no_entry_sign: This used to check MDN docs against some tests and cleanup tasks while editing, but add-on SDK based add-ons are obsolete. Use https://github.com/mdn/doc-linter-webextension and https://github.com/mdn/doc-linter-rules instead.
Travis CI currently fails to run the test suite. See https://travis-ci.org/Elchi3/mdn-doc-tests/jobs/156198463.
The reason for this is obviously that add-ons require to be signed starting from Firefox 48.0.
Sebastian