Firefox v.30 impacts Office 365 webmail on Macs

An alternate web browser like Safari must be used to access webmail on Macs.
An alternate web browser like Safari must be used to access webmail on Macs.

Apple Mac users will be unable to access Office 365 webmail via the latest release of the Firefox web browser, version 30. An alternate web browser like Safari must be used to access webmail on Macs.

Webmail access is not impacted on Windows-based computers using Firefox. Other University systems, including Firefly, appear to operate normally using all standard browsers.

The latest version of Firefox, scheduled for release June 11, uses stricter security controls which fail to negotiate typical network protocols and results in a “404 File not found” error message. UNL Information Technology Services will redirect Mac-based Firefox v30 users to the following message when accessing webmail*:

"The latest version of Firefox for Mac is incompatible with Office 365. Please access mymail.unl.edu with Safari or an alternate browser."

The issue has been reported to Mozilla, but no activity or timeline for possible resolution has been announced.

For additional questions, contact the UNL Computer Help Center at 472-3970 or Toll Free (866) 472-3970 or email at mysupport@unl.edu.


*A reboot of the computer may be required to view the message.

**NOTE UNL Office 365 webmail is only accessible via Firefox v30 using Windows operating systems. All other operating systems must use an alternative web browser to access mymail.unl.edu