make HTML generated by content scripts of extensions inaccessible to page scripts

Question

I would like to show HTML elements generated by extension content scripts over/inside the window area but make them inaccessible for site scripts so the page could not potentially detect/modify them through DOM. Are there any techniques specific for extension development which would allow to do this? Like layering or so

Answer 1

There aren't any special Chrome Extension techniques for this. As you'll read here , JavaScript injected via a content script is automatically sandboxed, or separated from the JavaScript on a web page, but this is not the case for HTML -- the DOM elements are shared between the page scripts and the injected content scripts.