Examine source code of Le Poisson Steve

{
  "manifest_version": 3,
  "name": "Le Poisson Steve",
  "version": "1.0",
  "description": "The Amazing Poisson Steve",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "style.css"
      ]
    }
  ],
  "icons": {
    "48": "animation.gif"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "animation.gif"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "sathanan.softproject@gmail.com"
    }
  }
}