Microsoft Add-Ins are web apps and are rendered using a browser. Microsoft generally does not use your default browser. Learn how to tell which browser is used for your add-in below. We've also included instructions on clearing the cache.
Windows Users
The version used is dependent on the combination of your Operating System and Office Version.
- Windows / non-subscription Office 2013 or later 
 Internet Explorer 11
- Windows 10 ver. < 1903 / Office 365 
 Internet Explorer 11
- Windows 10 ver. >= 1903 / Office 365 ver < 16.0.116291 
 Internet Explorer 11
- Windows 10 ver. >= 1903 / Office 365 ver >= 16.0.116291 
 Microsoft Edge2, 3
- Office on the web 
 The browser in which Office is opened.
Edge
Beginning with Office 365 version 16.0.11629 and Windows 10 version 1903, Office Add-ins running on Office 365 for Windows will use Microsoft Edge.
🔧 To clear Edge cache, close the CloudExtend application first and then follow the instructions here.
Internet Explorer
All lower versions of Windows and Office will use Internet Explorer (IE).
🔧 To clear IE cache, close the CloudExtend application first and then follow the instructions here.
Mac Users
Add-Ins on a Mac typically use Safari. If you can load the add-in click the (i) icon at the top-right and then choose Clear Web Cache. If you are using Office on the web the add-in will use the browser in which Office is opened.
🔧 To clear Safari cache, follow the instructions here.

