So, facebook.com thinks my Kobo Touch is an Android device, and renders accordingly. It even says “Using Android? get the FB app for Android!” (paraphrasing). It does this because the browser on the Kobo sends this as it’s user-agent string:
“Android” is listed ahead of the actual browser platform - AppleWebkit. User-agent strings are read left-to-right by web servers. Afaik, the Kobo Touch doesn’t run the Android OS, but it does run Linux.
The history of browser user-agents is gross: