Examine source code of Pixelate Images

{
  "manifest_version": 2,
  "name": "Pixelate Images",
  "version": "1.0",
  "description": "Toggle pixel-art effect on all images on the page via hotkey or popup.",
  "permissions": [
    "storage",
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "styles.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_action": {
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{db27e21a-4460-4c52-a96c-02d97b0ba501}"
    }
  }
}