Examine source code of Sync View

{
  "manifest_version": 2,
  "name": "Sync View",
  "version": "3.1.0",
  "description": "Shows your streaming activity on Discord Rich Presence — YouTube, Netflix, Spotify, Twitch, and more",
  "permissions": [
    "nativeMessaging",
    "tabs"
  ],
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*",
        "*://music.youtube.com/*",
        "*://*.netflix.com/*",
        "*://open.spotify.com/*",
        "*://*.hulu.com/*",
        "*://*.disneyplus.com/*",
        "*://*.primevideo.com/*",
        "*://*.amazon.com/gp/video/*",
        "*://*.twitch.tv/*",
        "*://*.soundcloud.com/*",
        "*://*.crunchyroll.com/*",
        "*://*.max.com/*",
        "*://tv.apple.com/*",
        "*://app.plex.tv/*",
        "*://*.plex.tv/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/icon-48.png",
    "default_title": "Sync View",
    "default_popup": "popup/popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "sync-view@syncview.app",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "data_not_collected": true
      }
    }
  }
}