Develop a workflow to use Firefox's libraries
Mozilla have generously provided us with guest access to their Figma libraries for Firefox. Since they're on a separate team from us, it doesn't look like we can "add" these libraries to our files in the same manner we can with internal libraries.
We can export each library as a .fig, and re-import it into our Figma team, however I think Figma will drop the associations between each file in the process (e.g. color styles from the Styles file that get reused in design files). Alternatively, we can copy/paste individual components across where needed.
With both approaches, we'd lose updates from the canonical libraries on Mozilla's end in the process too.