GitHub pages content available at GitHub and firefox.com domains

[devinreams]

As the title says: we are serving up one website on GitHub Pages (github.io) and the same at lockbox.firefox.com. Ideally we can just direct all traffic to the firefox.com domain.

---

As a quick solution: when I tried to set the mozilla-lockbox.github.io repo to have a custom domain of lockbox.firefox.com, to enforce the canonical URL (eg: don't serve content from both firefox.com and github.io domains), then the sub-directories for all other org repos don't work.

For example: https://lockbox.firefox.com/lockbox-extension/ returned 404 since GitHub Pages wasn't actually storing content at that hosted subdirectory but was re-constructing the URLs with that firefox.com domain.