This article contains the list of browsers that support full or light versions of OWA and the difference between the versions.

Browser OWA version
Interner Explorer 7 and later versions  Full
Interner Explorer 6 and earlier versions  Light
Firefox 3.0.1 and later versions  Full
Firefox 3.0 and earlier versions  Light
Chrome 3.0.195.27 and later versions  Full
Chrome 2.0.172 and earlier versions  Light
Safari 3.1 and later versions  Full
Safari 3.0.4 and earlier versions  Light
Microsoft Edge 25.10586.0.0  Full 

Note: 

The Light version is optimized for accessibility and supports less features than the full one. If your browser supports full version, you can switch between the two. 

Feature Full version Light version
 Spellcheck Available Not available
 Reading pane Available Not available
 Notifications and reminders Available Not available
 Calendar options Available Limited
 Arrange by Available Not available
 Share calendar Available Not available
 Open a shared calendar Available Not available
 Conversation view Available Not available