Problem: SNWeb does not load, wheel forever spins.
Solution: For Comcast Xfinity Subscribers Disable The Protected Browsing Feature
Step 1. While connected to your Comcast Xfinity WiFi network open the Xfinity XFi iOS or Android app.
Step 2. Choose the More button.
Step 3. Choose the My Services button
Step 4. Choose xFi Advanced Security > Disable
These instructions must have been written for an IOS user. I am on Android, and my screens do not look anything like this.