Everybody hears about Greasemonkey. Greasemonkey is a Mozilla Firefox extension known as augmented browsing.
This allows users to install scripts that make on-the-fly changes to web page content after or before the page is loaded in the browser.
Now you can use it with Chrome and Opera Next by using Tampermonkey.
This tool provides Greasemonkey script support for Google Chrome and Chromium Browser. Also is fully compatible with Greasemonkey, including GM_registerMenuCommand, GM_xmlhttpRequest with cross-domain support and access to the unsafeWindow object.
You can find more about this extension from a tampermonkey website.
The Userscripts.org was the source for tampermonkey.
Be careful: it’s a lot of SPAM and SCAM scripts that try to hijack your Facebook account.
