Examine source code of Lingofy

{
  "applications": {
    "gecko": {
      "id": "firefoxweb@lingofy.com",
      "strict_min_version": "53.0"
    }
  },
  "manifest_version": 2,
  "name": "__MSG_lingofy_title__",
  "version": "5.1.1.33",
  "description": "__MSG_lingofy_description__",
  "default_locale": "en",
  "icons": {
    "16": "images/icon16.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "browser_action": {
    "default_icon": {
      "19": "images/icon19.png",
      "38": "images/icon38.png"
    },
    "default_title": "StyleGuard Pro",
    "default_popup": "html/actionMenu.html"
  },
  "background": {
    "page": "html/background.html"
  },
  "permissions": [
    "activeTab",
    "contextMenus",
    "tabs",
    "storage",
    "webRequest",
    "webRequestBlocking",
    "management",
    "http://*/*",
    "https://*/*",
    "<all_urls>"
  ],
  "web_accessible_resources": [
    "js/common.js",
    "js/loginDialog.js",
    "js/logoutDialog.js",
    "js/aboutDialog.js",
    "images/icon16.png"
  ],
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*",
        "<all_urls>"
      ],
      "js": [
        "js/contentscript.js"
      ],
      "run_at": "document_end"
    }
  ]
}