Examine source code of AntiGIF

{
  "manifest_version": 2,
  "name": "AntiGIF",
  "version": "6",
  "description": "Automatically stops GIF animation on the page.",
  "permissions": [
    "activeTab",
    "tabs",
    "scripting"
  ],
  "browser_action": {
    "default_icon": "icons/icon-64.png",
    "default_title": "AntiGIF",
    "default_popup": "popup.html"
  },
  "icons": {
    "64": "icons/icon-64.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d3bc484e-7552-491e-8a67-047f5a38b0bf}",
      "strict_min_version": "115.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}