Examine source code of PixelCat

{
  "manifest_version": 2,
  "name": "PixelCat",
  "version": "2.6.9",
  "description": "Adds a playful pixel pet companion to your browser with animations, coins, fish, spiders, quests, achievements, and unlockable extras.",
  "permissions": [
    "storage",
    "tabs",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "src/background.js"
    ]
  },
  "icons": {
    "16": "assets/icons/icon16.png",
    "32": "assets/icons/icon32.png",
    "48": "assets/icons/icon48.png",
    "96": "assets/icons/icon96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "src/owner-gate.js"
      ],
      "run_at": "document_idle",
      "all_frames": false
    }
  ],
  "web_accessible_resources": [
    "assets/*",
    "assets/animations/*",
    "assets/animations/bat/*",
    "assets/animations/frog/*",
    "assets/animations/skeleton/*",
    "assets/animations/zombie/*",
    "assets/badges/*",
    "assets/balls/*",
    "assets/Cursor/light/*",
    "assets/fishes/*",
    "assets/icons/*",
    "assets/runner/*",
    "assets/runner/amogus/*",
    "assets/runner/duck/*",
    "assets/runner/patrick/*",
    "ui/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "pixel-cat@example.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "browser_action": {
    "default_popup": "ui/popup.html",
    "default_icon": {
      "16": "assets/icons/icon16.png",
      "32": "assets/icons/icon32.png",
      "48": "assets/icons/icon48.png",
      "96": "assets/icons/icon96.png"
    }
  }
}