Firefox plugin that can modify incoming data before the page processes it?
firefox-addon, html, javascript, plugins
Solution
You have a couple options:
- Tamper Data will modify POST parameters (and GET really since you can modify the URL).
- You can also combine FoxyProxy (https://addons.mozilla.org/en-US/firefox/addon/2464) with any number of free interactive proxies (Fiddler, Paros, Burp, Charles)
- Finally you can choose to not use a proxy and write up a greasemonkey script.
I think you'll likely have the most luck with the FoxyProxy + proxy approach. Unfortunately it's not a single addon.
Problem
Say a webpage loads an external javascript at load, is there any such FireFox plugin that I could use to modify the javascript before the page actually processes it? (not just specifically javascript) Thanks in advance. (also I'm pretty sure Tamper Data plugin only changes header data and not actual content being received)