Examine source code of HintHint

{
  "manifest_version": 2,
  "name": "HintHint",
  "version": "0.1.19resigned1",
  "description": "HintHint where you can wish, shop, share and organize all your gifting needs",
  "permissions": [
    "contextMenus",
    "tabs",
    "<all_urls>",
    "activeTab"
  ],
  "icons": {
    "16": "images/icon16.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "applications": {
    "gecko": {
      "id": "test@hinhint.com",
      "strict_min_version": "45.0"
    }
  },
  "author": "HintHint",
  "short_name": "Hint",
  "background": {
    "scripts": [
      "vendor/jquery.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "vendor/jquery.js",
        "bundle.js",
        "vendor/purify.min.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": "images/icon48.png",
    "default_popup": "popup.html"
  },
  "web_accessible_resources": [
    "images/ajax-loader.gif",
    "images/hint_logo.png",
    "images/icon.png",
    "images/icon128.png",
    "images/icon16.png",
    "images/icon48.png",
    "images/icon_copy.png",
    "images/icon_dropdown_selected.png",
    "images/icon_select.png",
    "images/logo_last.png",
    "images/new_email.png",
    "images/new_logo.svg",
    "images/next.png",
    "images/prev.png",
    "images/right.svg"
  ]
}