How to hook script to another page? (javascript)

Question

I'd like to write addition to some website. I don't have access to source code of this web page. This script will be only facilitation (show more info from cookies) and work on client-site. I won't change behavior of page.

When I load website, I should just run a script. How I can do that?

What browser are you using? chrome.google.com/webstore/detail/tampermonkey/… addons.mozilla.org/en-US/firefox/addon/greasemonkey — Patrick Murphy
– Patrick Murphy, Commented Jun 24, 2015 at 19:25
Thanks. Its answer to my question so you should add post and delete comment, and get some points :) — Luke Cupak
– Luke Cupak, Commented Jun 24, 2015 at 21:08

Patrick Murphy · Accepted Answer · 2015-06-24 21:15:02Z

1

To add custom javascript code to a page you do not own, use a browser extention like Tamper Monkey for chrome, or greeseMonkey for firefox

This will allow custom code to be run by your browser on pages you specify, note only you will see these changes.

answered Jun 24, 2015 at 21:15

Patrick Murphy

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