Please upgrade here. These earlier versions are no longer being updated and have security issues.
HackerOne users: Testing against this community violates our program's Terms of Service and will result in your bounty being denied.
How does one change the embed-friendly theme so it works with Debug like all the other themes?
it's the only theme shipped with Vanilla which doesn't show debug info. Even the mobile will show debug info.
I may not provide the completed solution you might desire, but I do try to provide honest suggestions to help you solve your issue.