Examine source code of Custom Clipboard Access

{
  "manifest_version": 3,
  "name": "Custom Clipboard Access",
  "description": "Let only user-approved sites read the clipboard without Firefox's paste confirmation.",
  "version": "1.0.0",
  "permissions": [
    "clipboardRead",
    "scripting",
    "storage"
  ],
  "optional_host_permissions": [
    "https://*/*",
    "http://localhost/*",
    "http://127.0.0.1/*",
    "http://[::1]/*"
  ],
  "icons": {
    "32": "icons/icon.svg",
    "64": "icons/icon.svg",
    "128": "icons/icon.svg"
  },
  "action": {
    "default_icon": "icons/icon.svg",
    "default_title": "Custom Clipboard Access"
  },
  "background": {
    "scripts": [
      "shared.js",
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options/index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6f3e4df2-5f1d-4a61-8a42-65f6d8fa7c58}",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}