Examine source code of Webskan

{
  "name": "Webskan",
  "version": "0.14.111resigned1",
  "manifest_version": 2,
  "description": "Webskan is a cloud solution which is going to drastically change the way you will be searching for information on the web.",
  "homepage_url": "https://webskan.com",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "default_locale": "en",
  "background": {
    "page": "/src/background/background.htm"
  },
  "browser_action": {
    "default_icon": "icons/icon19.png",
    "default_title": "WebSkan...",
    "default_popup": "src/popup/popup.htm"
  },
  "permissions": [
    "cookies",
    "webRequest",
    "webRequestBlocking",
    "contextMenus",
    "tabs",
    "activeTab",
    "<all_urls>",
    "notifications",
    "bookmarks",
    "downloads",
    "clipboardRead",
    "webNavigation"
  ],
  "web_accessible_resources": [
    "/src/override/override.htm",
    "/images/default-64.png"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "js/jquery-2.2.4.min.js",
        "js/content.js"
      ],
      "all_frames": false,
      "run_at": "document_start"
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "js/jquery-2.2.4.min.js",
        "js/content-loaded.js"
      ],
      "all_frames": true,
      "run_at": "document_end"
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "js/contentStart.js"
      ],
      "all_frames": true,
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://webskan.com/api*"
      ],
      "js": [
        "js/jquery-2.2.4.min.js",
        "js/webskan-api.js"
      ],
      "all_frames": true,
      "run_at": "document_start"
    }
  ],
  "applications": {
    "gecko": {
      "id": "contact@webskan.com",
      "strict_min_version": "47.0"
    }
  }
}