Examine source code of Better Notion RTL

{
  "name": "BetterNotionRTL",
  "version": "1.0",
  "description": "Aligns the text in the correct way on https://notion.so",
  "manifest_version": 2,
  "permissions": [
    "tabs",
    "*://*.notion.so/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.notion.so/*"
      ],
      "js": [
        "index.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "48": "icons/betterrtlicon.png"
  }
}