Examine source code of Website Timer

{
  "manifest_version": 3,
  "name": "Website Timer",
  "version": "1.0",
  "permissions": [
    "storage",
    "webRequest",
    "webRequestBlocking"
  ],
  "host_permissions": [
    "*://*.reddit.com/*",
    "*://*.facebook.com/*",
    "*://*.instagram.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "webTimer@blankdignity.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}