Examine source code of Jalios JReading

{
  "manifest_version": 2,
  "name": "Jalios JReading",
  "version": "1.1.1resigned1",
  "author": "Jalios S.A.",
  "description": "Jalios JReading Web Extension is an excellent tool for JPlatform user to save a web page to read it later.",
  "icons": {
    "16": "icons/jreading-16.png",
    "32": "icons/jreading-32.png",
    "48": "icons/jreading-48.png",
    "128": "icons/jreading-128.png"
  },
  "permissions": [
    "storage",
    "contextMenus",
    "tabs",
    "activeTab",
    "<all_urls>"
  ],
  "browser_action": {
    "default_icon": {
      "19": "icons/jreading-19.png",
      "38": "icons/jreading-38.png"
    },
    "default_title": "Jalios JReading"
  },
  "background": {
    "page": "background/background.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "js/libs/webextension-polyfill/browser-polyfill.js",
        "js/common.js",
        "content/js/content_script.js"
      ],
      "run_at": "document_end"
    }
  ],
  "content_security_policy": "script-src 'self' ; object-src 'self'",
  "web_accessible_resources": [
    "content/*/*"
  ],
  "short_name": "jreading-ff",
  "options_ui": {
    "open_in_tab": true,
    "page": "options/options.html"
  },
  "homepage_url": "https://addons.mozilla.org/fr/firefox/addon/jalios-jreading",
  "applications": {
    "gecko": {
      "id": "jreading.support@jalios.com"
    }
  }
}