Is there any way to modify the HTTP headers for IE6?

Question

I need to be able to modify the HTTP headers for Internet Explorer for testing purposes.

Basically, I want to achieve the exact same thing that the Modify Headers plugin for Firefox does.

All answers for this question are generalized and works for other versions. — Arashsoft, May 19 '16 at 13:48

Arashsoft · Answer 1 · 2017-03-01T14:43:13.463

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To modify the header with Fiddler:

1- Open Fiddler Web Debugger and in the menu toolbar go to Rules->Customize Rules... (shortcut is Ctrl + R). It opens the CustomRules.js file. Fiddler may suggest you to download Fiddler ScriptEditor but you can edit it with any text editor (I use notepad++)

2- Find OnBeforeRequest(oSession: Session) in the script file.

3- You can add a new header by adding oSession.oRequest["NewHeaderName"] = "New header value"; to OnBeforeRequest function. Also, to remove a header, use oSession.oResponse.headers.Remove("HeaderName"); function.

For more information see this link

edited Mar 01 '17 at 14:43

answered May 13 '16 at 17:33

Arashsoft

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This was a way more detailed answer than the accepted one. Thanks – Ramin Jun 28 '16 at 18:09

score 14 · Accepted Answer · answered Jul 01 '09 at 07:46

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You could install Fiddler and modify request headers with the CustomRules.js file

answered Jul 01 '09 at 07:46

PatrikAkerstrand

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The site has changed. Does Fiddler still have something to modify request headers? It is not obvious from the Fiddler application and I cannot find anything involving a CustomRules.js file. – Joey Dec 10 '15 at 22:05
@Joey Install Fiddler and install its [Syntax-Highlighting Add-Ons](http://www.telerik.com/fiddler/add-ons) then restart Fiddler and go to `Rules > Customize Rules...` then edit the file [as per the examples](http://docs.telerik.com/fiddler/KnowledgeBase/FiddlerScript/ModifyRequestOrResponse) and press `Save Script`. Now make a request and your new header(s) should show up. – Ian Kemp Oct 06 '16 at 10:24

score 3 · Answer 3 · answered Jul 01 '09 at 07:46

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You could use Charles Proxy to do all sorts of header rewriting. It's a great tool.

answered Jul 01 '09 at 07:46

Marc Novakowski

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Thanks! This also worked great, and is much nicer to use than Fiddler. Costs money though. – Daniel Alexiuc Jul 01 '09 at 21:54
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It still works without registration, just with nag screens and I think auto-shutdown after a period of time. However, once you start using this tool you'll quickly realize it's well worth the small price. – Marc Novakowski Jul 02 '09 at 16:29
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If you actually think it's "much nicer", I'd very much like to hear why. Please email me using the Help / Send Feedback link in Fiddler. – EricLaw Jul 27 '09 at 22:20

score 3 · Answer 4 · answered Feb 01 '10 at 01:24

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Proxomitron has the ability to modify headers for IE and its free

answered Feb 01 '10 at 01:24

Gautam

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Great tip! It's a bit fiddly to set up, but the best feature is that it doesn't require admin privileges to install. – Will Sheppard Apr 22 '15 at 10:01

Is there any way to modify the HTTP headers for IE6?

4 Answers4

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