Firefox 49.0 not loading

[Poindexter]

Firefox Browser not loading...
the status continues to state.... "Connecting.."
No error messages
This started with Firefox 49.0

Windows Vista Home Premium
Service Pack 2
32-bit OS

sandboxie Version 5.14 (32-bit)

Firefox 49.0.1

McAfee Security Center
Version: 14.0
Build: 14.0.339
Affld: 910
Language: en-us
Last Update: 06/26/2015

McAfee Antivirus
Version: 18.0
Build: 18.0.177
Last Update: 9/22/2016
Engine version: 2746.0