When I open anything in a new window for Office 365, I get a blank rendering of the content, which I obviously can't use.

This is frustrating, because anytime that I want to pop and email out of Outlook online to focus on later, I can't. Also, if I want to reply to a calendar invite, I can't because outlook pops up a new window that wont render. I really want to keep using firefox because of your mission and privacy... but I may have to move to chrome for this because most of my work is done in outlook online.