Loading jQuery into chrome-extension
Content scripts will never run in the context of an extension. The correct way to load scripts in your browser action popup is by including it in your code. Let your manifest file be:
{
"name": "Test Extension",
"version": "0.1",
"manifest_version": 2,
"options_page": "options.html",
"browser_action": {
"default_icon": "icon.png",
"default_popup": "popup.html",
"default_title": "Click me!"
}
}
And popup.html:
...
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="popup.js"></script>