Examine source code of Bandcamp Play

{
  "manifest_version": 3,
  "name": "Bandcamp Play",
  "version": "2.2.0",
  "description": "Automation of work with Bandcamp: autoplay, play/pause control by hotkeys and etc.",
  "host_permissions": [
    "https://bandcamp.com/*",
    "https://*.bandcamp.com/*"
  ],
  "permissions": [
    "tabs",
    "storage"
  ],
  "content_scripts": [
    {
      "js": [
        "scripts/content.js"
      ],
      "matches": [
        "https://bandcamp.com/*",
        "https://*.bandcamp.com/*"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "assets/button.png"
      ],
      "matches": [
        "https://bandcamp.com/*"
      ]
    }
  ],
  "action": {
    "default_title": "Bandcamp play settings",
    "default_popup": "popup/popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "borbiuk.n@gmail.com"
    }
  },
  "icons": {
    "16": "assets/logo-16.png",
    "32": "assets/logo-32.png",
    "48": "assets/logo-48.png",
    "128": "assets/logo-128.png"
  }
}