Background.js Doesn't Find Content Injected with Content Script

Question

My Chrome extension has a Content-Script that injects a custom DIV into the current page. This part works.

But then, the extension also has a right-click Context Menu, w

Answer 1

Wrong document in

var divHTML = document.getElementById('infoDiv').innerHTML;

Please read the Architecture Overview first. Your background script is executed in a separate HTML document, and as such won't "see" the page in the tab.

You'll need to pass the value to the content script to do something with a visible page. You'll probably need Messaging.