Over the weekend, we did an in-place upgrade of our TFS 2013 environment to TFS 2015 (Update 3)
Everything went well, but this morning I noticed that if I logged into our TFS website and opened any project collection and went to the CODE section, and then navigated to any file it wasn't showing the contents of that file. This was with Firefox
(PC) version 50.0.2 as well as Chrome (PC) version 54.0.2840.99 m. (This is a PC running Windows 10 Education 64-bit, version 1607, build 14393.447) I also tried on my MacBook with Safari; same problem.
If I use Internet Explorer (or Microsoft Edge), the contents appear normally, so this isn't a permissions issue.
This was working fine in TFS 2013. Any ideas here?