Is there such a thing as the "Tamper Data firefox plugin" for chrome?

Question

I can't find anything that is remotely similar to this. Is there a limitation in chrome/webkit that makes it impossible ?

Tamper Data Plugin

Solution

No and there won't be any time soon because Chrome's add-on api is more restrictive than firefox. However you can use Burp which is better in every way. Most importantly Less bugs, more features, more compatible with strange post formats.