title: Firefox Container Tabs and Microsoft Teams: what domains should I add to the container?
body: <p>When I open MS Teams in a Firefox Container tab, I get redirected a number of times and then I get</p>
  
  <blockquote>
    <p>D'oh! To open the web app, you need to change your browser settings to allow third-party cookies.</p>
  </blockquote>
  
  <p>I've opened Teams in a new FF profile and I can see it added cookies to the following domains:</p>
  
  <ul>
  <li>ams.skype.com</li>
  <li>img.teams.skype.com</li>
  <li>login.microsoftonline.com</li>
  <li>microsoft.com</li>
  <li>microsoftonline.com</li>
  <li>office.com</li>
  <li>office365.com</li>
  <li>outlook.office365.com</li>
  <li>portal.office.com</li>
  <li>sharepoint.com</li>
  <li>skype.com</li>
  <li>suite.office.com</li>
  <li>sway.office.com</li>
  <li>teams.microsoft.com</li>
  <li>teams.skype.com</li>
  <li>webshell.suite.office.com</li>
  <li>www.office.com</li>
  </ul>
  
  <p>(which seem to belong to the O365 suite)</p>
  
  <p>and also</p>
  
  <ul>
  <li>auth.han.nl</li>
  <li>han.nl</li>
  <li>hannl.sharepoint.com</li>
  </ul>
  
  <p>which are specific to my organisation</p>
  
  <p>I've tried adding all these to the container by adding them to "Always open with (Container)", but I keep getting the redirection. What else should I do to keep Teams in a container? I do not want to disable container tabs.</p>