Modifying HTTP response headers in Firefox

Question

Does anyone know if Firefox extensions are allowed to modify HTTP response headers? For example, can an extension remove the x-frame-options header to let the page load in an iframe?

Thanks

PourBico allows you to modify response headers. – srgsanky Aug 20 '15 at 05:27 — srgsanky, Aug 20 '15 at 05:27

Etienne · Answer 1 · 2012-02-23T10:04:17.830

5

I think the best firefox addon for modifying headers is TamperData :

https://addons.mozilla.org/en-US/firefox/addon/966/

edited Feb 23 '12 at 10:04

answered Aug 17 '10 at 08:21

Etienne

53
1
5

5

Correct me if I'm wrong, TamperData, like ModifyHeaders can't modify HTTP response headers, only request headers. – baptx Feb 05 '13 at 20:09

score 3 · Accepted Answer · answered Jul 15 '10 at 16:08

3

S. Wong is correct. Modify Headers supports modification of request headers only at present. However, I am looking at supporting response headers for a future version.

answered Jul 15 '10 at 16:08

Gareth

46
2

There is a Firefox addon that was created for modifying CORS HTTP response headers but you can customize this headers in about:config/forcecors.headers, see https://addons.mozilla.org/en-US/firefox/addon/forcecors/ – baptx Feb 05 '13 at 20:13

score 2 · Answer 3 · answered Jun 21 '13 at 16:34

it's late but i found some thing, i was going through code of "temper data" extention and i was able to modify the response as:

  observe: function(aSubject, aTopic, aData) {

    if (aTopic == 'http-on-modify-request') {
        aSubject.QueryInterface(Components.interfaces.nsIHttpChannel);
        this.onModifyRequest(aSubject);
       }
}   


   onModifyRequest(oHttp){
     //this is how i modify the set-cookie field from header
      oHttp.setResponseHeader("Set-Cookie", enc, false);
   }

score 1 · Answer 4 · answered Jan 22 '16 at 10:37

1

Install PourBico for Firefox.

Open PourBico window. Reload URL, modify the header, reload page.

answered Jan 22 '16 at 10:37

Christophe Roussy

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score 1 · Answer 5 · answered Jan 26 '11 at 16:28

1

There is a Modify Response addon that is limited to Content-Type, but should be adaptable to all (most) others.

answered Jan 26 '11 at 16:28

Bogdan Harjoc

11
1

score 0 · Answer 6 · answered Mar 29 '10 at 10:50

0

Yes they can modify HTTP response headers if you look at below links you will have a better idea.

http://wareseeker.com/free-modify-headers/

http://www.softpedia.com/get/Internet/Internet-Applications-Addons/Mozilla-Extensions/Modify-Headers.shtml

http://modifyheaders.mozdev.org/

answered Mar 29 '10 at 10:50

Ravi Vanapalli

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2

I think Modify Headers only modify request headers and not response ones. – Kar Mar 29 '10 at 11:51

Modifying HTTP response headers in Firefox

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