I have gone to google drive and selected cogwheel -> settings -> checked "offline"
Within the document in its "offline status" button it says:
This document is ready for offline use You can edit this document without an internet connection. Changes will save to Drive once reconnected.
If I go offline while editing it then go back online it works.
However I am supposed to be able to open that doc in a new tab when I'm offline and it will load. Currently it just does the dinosaur. Same with drive.google.com
No internet Try: * Checking the network cables, modem, and router * Reconnecting to Wi-Fi ERR_INTERNET_DISCONNECTED
On another computer it works as expected.