Examine source code of Show Links

{
  "manifest_version": 2,
  "name": "Showlinks",
  "version": "2.2resigned1",
  "author": "Marcus Galavics",
  "description": "Finds all links and files(CSS, JS, Images) in a page.",
  "icons": {
    "16": "icons/icon_16x16.png",
    "48": "icons/icon_48x48.png",
    "64": "icons/icon_64x64.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_icon": "icons/icon_16x16.png",
    "default_title": "Showlinks"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "match_about_blank": true
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "marcus.galavics@gmail.com"
    }
  }
}