Examine source code of Headgear

{
  "name": "Headgear",
  "action": {
    "default_title": "Headgear (Reddit Avatars)",
    "default_popup": "html/popup.html"
  },
  "manifest_version": 3,
  "version": "0.7.0",
  "description": "Unleash your Reddit Avatar.",
  "host_permissions": [
    "*://*.reddit.com/"
  ],
  "permissions": [
    "scripting",
    "storage",
    "cookies",
    "clipboardWrite"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "32": "img/logo_32.png",
    "72": "img/logo_72.png",
    "128": "img/logo_128.png",
    "512": "img/logo_512.png"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "*.js.map"
      ],
      "matches": [
        "https://www.reddit.com/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "headgear@h4l.users.github.com",
      "strict_min_version": "109.0"
    }
  }
}