Fiddler not capturing traffic from browsers

Question

I\'ve been using Fiddler for quite a while, but all of a sudden it no longer captures internet traffic. I\'m on Chrome 29 and Fiddler v4.4.5.1. I\'ve checked all filters a

Answer 1

For it was betternet extension was causing issue. I think any kind of proxy extension installed on Chrome causing issue.

Answer 2

I too faces similar problem, but once I did the below settings, everything was working fine(While working on other application, I selected 'No Proxy' setting in browser which I forgot to revert.Hence, got this problem)

• In Fiddler, Goto Teleric Fiddler Options->Gateway , then select 'Use System Proxy (recommended)' radio button and click on 'OK' button and restart Fiddler
• In your Browser(for ex: firefox), Goto Options->Advanced->Network->Settings then select 'Use system proxy settings' radio button and click on OK
• Now try accessing any URL from that browser, and observe they are being recorded in Fiddler(If you have applied filters, even they will start working)

Hope this helps..

Get back to me with any other problems

Answer 3

I had the same problem, when i disabled chrome extension called ZenMate Proxy extension that fixed the problem

Answer 4

I had exactly the same problem. I finally gave up. Reset Chrome's browser settings to default. Uninstalled then reinstalled Fiddler. After that, everything worked.

Answer 5

After hours of googling, reading, uninstalling, facepalming! It turned out that a chrome extension for VPN was handling the proxy settings for Chrome!

Betternet to be more specific!

Disabling it, solved my problem.

To make sure it is not the problem, check the proxy settings for Chrome itself. For me it showed me a message, says : Betternet is handling the proxy settings.

Answer 6

1. Use Help > Troubleshoot Filters to make sure the traffic isn't getting hidden unexpectedly.
2. Look in the Log tab to see if there's a note about Chrome Group Policy hardcoding the proxy.
3. Update your question to mention whether other browsers' traffic is captured.
4. Visit http://localhost.fiddler:8888/ in Chrome; What if anything do you see?
5. Visit http://127.0.0.1:8888/ in Chrome; What if anything do you see?

If you find that steps #1 - #4 don't show anything, this means that Fiddler is unable to set your system proxy information; this might be caused by security or VPN software. (Group Policy can also prevent setting, but Fiddler will usually warn you if this is the case).

When Fiddler is capturing, click Tools > WinINET Options > LAN Settings and see whether the proxy is set properly (should point at 127.0.0.1:8888). If not, you might try running Fiddler elevated (as Administrator) to see if it makes a difference. It may be helpful to collect a trace using SysInternals' Process Monitor tool, filtered to Registry operations on the ProxyServer registry key.

If step #5 doesn't show anything, this means that you have a firewall or some other software interfering with connections to Fiddler.