Examine source code of Gallery Collector

{
  "manifest_version": 2,
  "name": "Gallery Collector",
  "version": "5.2.9",
  "description": "Finds images in tags, srcsets and CSS backgrounds, with size and type filters.",
  "browser_specific_settings": {
    "gecko": {
      "id": "{83a9e3de-255f-434c-9673-390005be1c2e}",
      "strict_min_version": "101.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "32": "images/icon32.png",
    "48": "images/icon48.png",
    "64": "images/icon64.png",
    "96": "images/icon96.png",
    "128": "images/icon128.png"
  },
  "permissions": [
    "activeTab",
    "downloads",
    "storage",
    "clipboardWrite"
  ],
  "browser_action": {
    "default_popup": "src/popup.html",
    "default_title": "Gallery Collector",
    "default_icon": {
      "32": "images/icon32.png",
      "48": "images/icon48.png",
      "64": "images/icon64.png",
      "96": "images/icon96.png",
      "128": "images/icon128.png"
    }
  },
  "web_accessible_resources": [
    "src/core.js",
    "src/collect.js"
  ]
}