Hi, please try a Refresh but Note that this does more than uninstalling and re-installing does. Normal uninstalling does not remove some preferences which may have become corrupt. Please Refresh but do this 1st:

• https://support.mozilla.org/en-US/kb/export-firefox-bookmarks-to-backup-or-transfer
• https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles

then

• https://support.mozilla.org/en-US/kb/refresh-firefox-reset-add-ons-and-settings

No, didn't work

Another user mentioned a temporary problem with Office online but indicated it was fixed earlier today. Is yours still not working? If not, how far do you get? For example, does it let you log in, and then you get some kind of progress indicator (or lack of progress indicator) for the Inbox?

It just stays on "working" but never opens

The weird thing is that the same is happening on Internet Explorer but I am able to get in on Chrome. I would rather use firefox as all my bookmarks are there.

Does it make any difference if you change the address between these:

• https://outlook.office.com/owa/
• https://outlook.office365.com/owa/