I have a new Chromebook and was planning on using Office 365 through the browser but I simply can't even open or create an office document in the browser.
If I try to create a new document in office 365 or open an existing document, it simply takes me to onedrive on the web, and then it trys to open adobe so as to to pdf the document. Very weird.
It turns out that you cannot install then Onedrive app and use Office 365 web version, on a Chromebook. I had to uninstall the onedrive app.