Examine source code of Media Battery

{
  "manifest_version": 3,
  "name": "Media Battery",
  "version": "1.5.0",
  "description": "A battery for media sites that recharges on its own. Time on tracked platforms drains it; it refills while you're away. At empty the sites are blocked, and getting back in early takes deliberate friction. Add your own sites too.",
  "browser_specific_settings": {
    "gecko": {
      "id": "media-battery@milo",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage",
    "scripting",
    "alarms"
  ],
  "optional_host_permissions": [
    "*://*/*"
  ],
  "host_permissions": [
    "*://*.youtube.com/*",
    "*://*.reddit.com/*",
    "*://*.instagram.com/*",
    "*://*.tiktok.com/*",
    "*://*.x.com/*",
    "*://*.twitter.com/*",
    "*://*.facebook.com/*",
    "*://*.twitch.tv/*",
    "*://*.linkedin.com/*",
    "https://sb.dirt23.site/*"
  ],
  "background": {
    "scripts": [
      "projection.js",
      "sync.js",
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*",
        "*://*.reddit.com/*",
        "*://*.instagram.com/*",
        "*://*.tiktok.com/*",
        "*://*.x.com/*",
        "*://*.twitter.com/*",
        "*://*.facebook.com/*",
        "*://*.twitch.tv/*",
        "*://*.linkedin.com/*"
      ],
      "js": [
        "platforms.js",
        "friction.js",
        "content.js"
      ],
      "run_at": "document_start",
      "all_frames": false
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "Media Battery",
    "default_icon": "icons/icon.svg"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "icons": {
    "48": "icons/icon.svg",
    "96": "icons/icon.svg"
  }
}