Examine source code of Presentation Mode for Reddit

{
  "manifest_version": 3,
  "name": "Presentation Mode for Reddit",
  "version": "0.5.3",
  "description": "Turn the Reddit page you are browsing into a media slideshow.",
  "permissions": [
    "activeTab",
    "scripting",
    "storage"
  ],
  "host_permissions": [
    "https://reddit.com/*",
    "https://*.reddit.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://reddit.com/*",
        "https://*.reddit.com/*"
      ],
      "js": [
        "auto-activate.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "64": "favicon.png",
    "128": "icon-128.png"
  },
  "action": {
    "default_title": "Open presentation mode",
    "default_icon": {
      "64": "favicon.png",
      "128": "icon-128.png"
    }
  },
  "commands": {
    "open-presentation": {
      "suggested_key": {
        "default": "Alt+P",
        "mac": "Alt+P"
      },
      "description": "Open presentation mode"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "presentation-mode@redditp.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}