Examine source code of Sudoku Play

{
  "manifest_version": 3,
  "name": "Sudoku Play",
  "short_name": "Sudoku Play",
  "version": "1.0.0",
  "description": "Play a compact 9x9 Sudoku in the extension and jump to more puzzles on sudoku-play.org.",
  "homepage_url": "https://sudoku-play.org/browser-extension/",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "64": "icons/icon-64.png",
    "128": "icons/icon-128.png"
  },
  "action": {
    "default_title": "Sudoku Play",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "64": "icons/icon-64.png",
      "128": "icons/icon-128.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "sudoku-play-browser-extension@lukichev.biz",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}