Thanks for the reply Eric.
Fiddler Web Debugger (v188.8.131.52)
Built: Friday, October 30, 2015
32-bit x86, VM: 36.0mb, WS: 47.0mb
.NET 2.0.50727.5485 WinNT 6.1.7601 SP1
Yes, "Capture HTTPS CONNECTs", and "Decrypt HTTPS traffic" checked.
Here is the about:network. And looking at it, and then googling the obvious bit about the Chrome GPO and the Script= http://www-proxy-pac.lmig.com/proxy.pac, I think I can anticipate what you'll say my problem is: it looks like my company (sometime in the last year) set up a GPO that is essentially hardcoding Chrome's proxy settings. Which is kind of funny, because I'm testing using FireFox, but there are some behaviors here that appear like the "no proxy" in FireFox is being ignored (in at least one respect).
-= Fiddler Event Log =-
See http://fiddler2.com/r/?FiddlerLog for details.
13:21:15:4568 Fiddler Running...
13:21:15:4608 !WARNING Fiddler has detected that Chrome GPO specifies proxy configuration 'system'.
13:23:19:1822 -- NetworkInterfaces --
Loopback Pseudo-Interface 1 'Software Loopback Interface 1' Type: Loopback @ 1,073,741,824/sec. Status: UP
VirtualBox Host-Only Network 'VirtualBox Host-Only Ethernet Adapter' Type: Ethernet @ 100,000,000/sec. Status: UP
Local Area Connection 'Intel(R) 82577LM Gigabit Network Connection' Type: Ethernet @ 1,000,000,000/sec. Status: UP
Wireless Network Connection 2 'Microsoft Virtual WiFi Miniport Adapter' Type: Wireless80211 @ 450,000,000/sec. Status: DOWN
Wireless Network Connection 'Intel(R) Centrino(R) Ultimate-N 6300 AGN' Type: Wireless80211 @ 450,000,000/sec. Status: DOWN
Total bytes received (IPv4): 304,785,140
RAS reports 1 Connectoids
-= WinINET settings for 'DefaultLAN' =-