browser extension to replace JavaScript file on a live site for testing

Question

I\'m looking for a browser extension (Firefox, Chrome) allowing to replace a Javascript file on a live Web site to do some testing/hacking.

Basically, it should take a U

Answer 1

There is https everywhere which lets you define rules for url rewrites. This should work on all request, including script requests.

Tamper data might do the job, but I don't know how automated/permanent you can set it up.

And there is also an extension called redirector. I didn't test that one. Potentially it only works on the address bar.

Update:

That is unfortunate. In that case probably a proxy is you only way. What about a firefox extension that is a proxy, like Foxyproxy