Examine source code of Page Headline Navi

{
  "description": "Navigate Page HeadLine",
  "manifest_version": 2,
  "name": "Page Headline Navi",
  "permissions": [
    "tabs",
    "activeTab",
    "<all_urls>",
    "storage"
  ],
  "version": "1.2resigned1",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "32": "icons/html32.png"
  },
  "browser_action": {
    "browser_style": true,
    "default_title": "Page Headline Navi",
    "default_icon": {
      "32": "icons/html32.png"
    }
  },
  "sidebar_action": {
    "default_icon": "icons/html32.png",
    "default_title": "Page Headline Navi",
    "default_panel": "headline.html"
  },
  "commands": {
    "_execute_sidebar_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+H"
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "injection.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{0237725a-e662-417e-9585-3bfb427f675d}"
    }
  }
}