How wappalyzer(Mozila addon),GTmetrix finds the cms platform
browser
Solution
You can view Wappalyzer's source code: (Ctrl+F Magento):
https://github.com/ElbertF/Wappalyzer/blob/master/share/js/apps.js
Most likely Wappalyzer picked up on the "Mage" JavaScript variable. You can see this by clicking the DOM tab in Firebug.
Problem
I am currently developing a site which is not supposed to expose its developer magento platform(Sorry about that ). I thought the wappalyzer(Mozila addon),GTmetrix site is finding the cms names by its html format but when i saw a empty white page with that tools it still shows me like am using Magento(there is nothing in the source view - its white page), so now how they are finding that am using magento. Any idea about hw they are working? I checked headers but there nothing specially mentioned as magento. Same goes with wordpress/joomla - simply wappalyzer(Mozila addon),GTmetrix finds the site platform even there is no html source. So I guess something with in header(i might missing something) or what it can be? please advice. Attached screenshot of it. Thanks in advance