Examine source code of Plex Media Scan

{
  "manifest_version": 3,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "default_locale": "en",
  "version": "1.0.5",
  "author": "Patrik Elfström",
  "homepage_url": "https://github.com/PatrikElfstrom/plex-media-scan#readme",
  "icons": {
    "48": "icons/logo-48.png",
    "96": "icons/logo-96.png",
    "144": "icons/logo-144.png",
    "192": "icons/logo-192.png"
  },
  "screenshots": [
    {
      "src": "screenshots/install.png",
      "sizes": "510x327",
      "type": "image/png",
      "platform": "wide",
      "label": "1. Go yo your plex server. 2. Click extension icon in the top right. 3. Click the cog by the Plex Media Scan extension. 4. Click 'Always Allow on [your plex server]'. 5. Reload the page."
    },
    {
      "src": "screenshots/screenshot.png",
      "sizes": "414x265",
      "type": "image/png",
      "platform": "wide",
      "label": "A button is added to the top header that allows you to easily scan for new or updated content on just that media."
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "@plex-media-scan"
    }
  },
  "host_permissions": [
    "http://*/*",
    "https://*/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "plex-media-scan.js"
      ],
      "run_at": "document_end"
    }
  ]
}