Examine source code of Folx 5

{
  "manifest_version": 2,
  "name": "__MSG_name__",
  "short_name": "__MSG_short_name__",
  "description": "__MSG_description__",
  "version": "5.25",
  "default_locale": "en",
  "icons": {
    "16": "images/icon16.png",
    "32": "images/icon32.png",
    "64": "images/icon64.png",
    "128": "images/icon128.png"
  },
  "permissions": [
    "<all_urls>",
    "storage",
    "downloads",
    "contextMenus",
    "webRequest",
    "webRequestBlocking",
    "nativeMessaging",
    "notifications",
    "tabs",
    "activeTab",
    "cookies",
    "http://*/*",
    "https://*/*",
    "ftp://*/*"
  ],
  "browser_action": {
    "default_title": "__MSG_name__",
    "default_icon": {
      "16": "images/icon16.png"
    }
  },
  "background": {
    "page": "background.html"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*",
        "ftp://*/*"
      ],
      "run_at": "document_end",
      "js": [
        "js/endscript.js"
      ]
    }
  ],
  "applications": {
    "gecko": {
      "id": "folx5@eltima.com",
      "strict_min_version": "55.0"
    }
  }
}