The security check should detect properly the web engine based on the user agent http header and provide only javascript stuff for geeko/blink/webkit (the only

The security check should detect properly the web engine based on the user agent http header and provide only javascript stuff for geeko/blink/webkit (the only 3), and a noscript/basic (x)html system for all the others (netsurf/links2/edbrowse/lynx/dillo/any lean and light web engine past/present/futur).