Update it! Rated 3 out of 5 stars

I loved it but the UI is glitched on newer versions of Firefox.

Rated 5 out of 5 stars

Does what it says and it does it well. There are some minor hiccups with how it looks but it's neither major nor does it hinder the usage at all - still worth full 5 stars.

Rated 5 out of 5 stars

its the best one for modifying headers

Rated 5 out of 5 stars

thanks for great work
it seems it have compatibility problem with firefox 18 , hope to get new release pretty soon

Rated 5 out of 5 stars

This is such a great addon! It does exactly what I'm looking for.

Security issues with this Addon Rated 1 out of 5 stars

Security Issues founded with your Addon: http://www.breakthesecurity.com/2012/11/how-to-upload-shell-via-tamper-data-hack.html#more

Misleading

The linked article documents how to break into a site using TamperData, NOT a security flaw in TamperData.

The exploit described is exactly the kind of fault in security coding that TamperData, and a good security testing plan is designed to help detect. Proper security testing, which a tool like TamperData can be part of, should be a part of the dev/qa cycle for exactly this reason.

TamperData is a testing tool, not a hacking tool, but this article is evidence that, like all tools, it can be misused. I don't support this.

Rated 1 out of 5 stars

I face login problem on all websites while using tamper data. But the same logins work without any problem without it. I think the plugin is buggy.

great tool Rated 5 out of 5 stars

AMAZING TOOL!!! THANK YOU! :-)

Rated 5 out of 5 stars

My Best Or Favorite Add-on is Tamper Data.

This Is Best..... Really Awesome Invent.

Basic yet so useful Rated 4 out of 5 stars

A must have pen-test tool for every security enthusiast : practical, easy to use and saved me a lot of time rather than going through a third party tool and fixing a proxy for altering the traffic, used it when i was a student to track vulnerabilities in some web sites that i have of course declared and i am still using it now as a security consultant in financial software company.Adding a filter to alter only a specific request when monitoring the traffic (like GET or POST or a request with a specific URL ) will be a great feature because it's kind of annoying having a pop-up for every unwanted request. Worth 4 stars review just to encourage the developer to turn this add-on into complete pen-test tool with more advanced features(like fuzzer, spider or advanced cookies editor) .

Rated 5 out of 5 stars

xd

Rated 4 out of 5 stars

does not work!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

This user has a previous review of this add-on.

Rated 5 out of 5 stars

Great addon! But also I would like to be able to change method of request (GET to POST and vice versa) and to be able to catch GET/POST requests sent by other addons.

Rated 5 out of 5 stars

I love it!!
Works on Firefox 9 also!!

Rated 5 out of 5 stars

yty

Rated 5 out of 5 stars

Danke - nützliches Add-on

Rated 4 out of 5 stars

This is an amazingly useful application. Would be 5 stars if I didn't have to turn the menu bar on to launch it. Even works in FF 7!

Rated 5 out of 5 stars

Interesting.

Rated 5 out of 5 stars

Great extension - thank you!

Rated 5 out of 5 stars

You can open tamper data with a toolbar icon with this plugin:
https://addons.mozilla.org/en-US/firefox/addon/tamper-data-icon/