URL: https://www.outlook.com
Browser / Version: Firefox 42.0
Operating System: Windows 7
Problem type: Something else - I'll add details below

Steps to Reproduce

1. Navigate to: https://www.outlook.com & log into the email account.
2. There's a bunch of smooth animation when you click on different item on the email pages with Opera but none when you choose Firefox as the browser.
   Even though there are a couple of animated elements the transitions are not smooth and often appear clunky.

Expected Behavior:
Equal browsing experience of Firefox just like Opera. Smooth Transitions and Animations.

Actual Behavior:
Clunky non smooth animations/transitions OR no animations on Firefox while everything is enabled on Opera.