proxy - fiddler not capturing any browser traffic (Not IE, FF, or CHROME) -

i'm not getting traffic browser (or app). 2 things contributing:

1) i'm in workplace , running corporate proxy
2) win inet lan settings locked down

running win7 64 fiddler 4.5.1.0
i've tried:
default install of fiddler
ie 11 no add-ons.
running fiddler administrator
changing group policy "make proxy setting per machine" disabled

no errors/warning messages fiddler
no filters being used, filter box unchecked
log tab empty
filter troubleshooting enabled shows no activity
http://localhost.fiddler:8888/ returns unknown host
http://127.0.0.1:8888/ returns 200

is fiddler compatible corporate proxies? thanks

is fiddler compatible corporate proxies?

of course. fiddler developed behind corporate proxy (microsoft's) 9 years.

you've identified source of problem: "2)" -- system proxy settings locked down.

the described workarounds of setting group policy or running fiddler @ admin work in every case i've ever seen, require have appropriate permissions , execute these steps correctly.

having said that, both firefox , chrome can configured use proxy settings different system's proxy settings; firefox’s proxy settings found opening tools menu, clicking options item, , opening advanced settings. select network tab. @ top of tab, click settings… button right of configure how firefox connects internet. set http , https proxies 127.0.0.1:8888 .

for chrome, launch via: chrome --proxy-server=http://127.0.0.1:8888.