
Tamper Data is a Firefox Add-on which is very helpful for hacking, you just have to download it in this website: https://addons.mozilla.org/en-US/firefox/addons/policy/0/966/33806
Once you have downloaded it, just go to Tools, then Tamper Data, then press start tampering and each time you open, refresh or submit something to a website, Tamper Data is going to ask you if you want to change values or anything in the website such as prices, names, any changes available, the other good thing is that it can also work as a keylogger(a program used to hack passwords from a computer) because it keeps tracks of sites that have been visited while Tamper Data was open. It may sound kinda hard to manage but once you use it once or twice you will find out that it actually is pretty easy.



