Masquerade/change HTTP_USER_AGENT string permanently using JavaScript?

Question

Is there a way to change/modify the value of user-agent string permanently using JavaScript?

Pekka · Accepted Answer · 2011-02-28 01:39:24Z

1

You mean from a web page inside a browser?

No, definitely not. Neither permanently nor temporarily.

answered Feb 28, 2011 at 1:39

Pekka

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alex · Accepted Answer · 2011-02-28 01:40:14Z

1

You can't even modify navigator.userAgent (at least on my test with Firefox).

So, no.

answered Feb 28, 2011 at 1:40

alex

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Comments

Peter O. · Accepted Answer · 2012-01-09 23:23:27Z

-1

Try this.

alert("User-agent header sent: " + navigator.userAgent);
navigator.__defineGetter__('userAgent', function(){ return "Hello" });
alert("User-agent header sent: " + navigator.userAgent);

edited Jan 9, 2012 at 23:23

Peter O.

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answered Jan 9, 2012 at 23:15

ZER Tech

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1 Comment

user244343 Over a year ago

-1 This is a bad hack, and doesn't actually change anything. You're just overriding the getter, which will have to be done on every single page, and if you're planning on doing that then why are you even bothering to check userAgent in the first place?

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