Do you use Sitemod?
Sitemod.io Chrome Extension
Sitemod.io lets anybody modify, save & share any website in real time, without having access to the source code of the website.
Use Chrome Developer Tools to edit any HTML, CSS or JS code in the web page or add your own. Save and get a unique URL to the modified version.
Sitemod.io comes in the form of a free browser extension.
(Sitemod is rated 5/5 based on 4 reviews)