Examine source code of Browsing Timer

{
  "manifest_version": 2,
  "name": "Browsing Timer",
  "version": "1.0.0",
  "description": "Track your browsing time per website. See how long and how often you visit each site.",
  "permissions": [
    "tabs",
    "idle",
    "storage",
    "alarms",
    "webNavigation"
  ],
  "background": {
    "scripts": [
      "utils/domains.js",
      "utils/storage.js",
      "background/background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    },
    "default_title": "Browsing Timer",
    "default_popup": "popup/popup.html"
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "content_security_policy": "script-src 'self'; object-src 'self';",
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "id": "{8c85cbbf-fe7f-4b95-a582-a055a09a1ba0}"
    }
  }
}