I want to use fiddler to monitor api calls made by my browser when it visits some pages.
The technology - Fiddler 4.6x, Chrome 56, Firefox 51, Windo
After I reinstalled fiddler and did what Abir suggested Fiddler still didn't capture any traffic.
In my case it stopped working because I installed a chrome extension named Tunnel Bear, uninstalling the extension solved it for me.