Examine source code of Linkedin RTL support

{
  "manifest_version": 3,
  "name": "Linkedin RTL support",
  "version": "0.3.0",
  "description": "Adds multilingual support to linkedin text fields",
  "icons": {
    "16": "images/icon_16.png",
    "48": "images/icon_48.png",
    "128": "images/icon_128.png",
    "256": "images/icon_256.png",
    "512": "images/icon_512.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.linkedin.com/*"
      ],
      "js": [
        "index.js"
      ],
      "css": [
        "index.css"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "linkedin-rtl-support@mordech.com"
    }
  }
}