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Firefox Developer Tools shows 200 instead of 302 when using Burp as a proxy

Ricardo | Last updated: Feb 16, 2017 05:47PM UTC

Not sure why but for some 302 response if I'm using Burp as a proxy on Firefox from Burp Proxy History or Interception I can see the 302 but on Firefox Developer Tools shows me 200. Removing Burp as a proxy from Firefox I can see the same response as 302 on Firefox Developer Tools as supposed to be. On Chrome also using Burp as a proxy the same response I can see as a 302 on Burp and Chrome Developer Tools.

Liam, PortSwigger Agent | Last updated: Feb 17, 2017 09:18AM UTC

Hi Ricardo Thanks for your message. We've tested this and experienced the same behaviour. This may be a bug in Firefox, we'll investigate further and let you know if we come up with anything.

Liam, PortSwigger Agent | Last updated: Feb 17, 2017 11:19AM UTC

Hi Ricardo We've done some further testing and we're convinced this issue is with the developer tools rather than Burp Suite. Thanks for the report.

Burp User | Last updated: Feb 23, 2017 07:26PM UTC

Thanks! I've opened a case on Firefox. https://bugzilla.mozilla.org/show_bug.cgi?id=1342185

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