Examine source code of HTML Capture

{
  "manifest_version": 2,
  "name": "HTML Capture",
  "version": "1.1",
  "description": "Realtime HTML Capture",
  "icons": {
    "48": "48x48.png",
    "96": "96x96.png"
  },
  "sidebar_action": {
    "default_title": "HTML Capture",
    "default_panel": "sidebar.html",
    "default_icon": {
      "16": "16x16.png",
      "32": "32x32.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "webpage.js"
      ]
    }
  ],
  "applications": {
    "gecko": {
      "id": "html-capture@elder-alliance.org"
    }
  }
}