Upon logging in, the plugin should check if the user’s email address matches the following, or if any additional email addresses registered with the user on Mozillians match the following:
- *@mozilla.com
- *@mozillafoundation.org
- *@mozilla-japan.org
If an email address does, they should be added to the mozillians_staff group. If none do, but the user currently is in the mozillians_staff group, they should be removed.