Examine source code of Attention Auditor

{
  "manifest_version": 2,
  "name": "Attention Auditor",
  "version": "1.0.0",
  "description": "Measures where your browsing time really goes, asks 'was that worth it?' after long sessions, and gives you a brutally honest weekly report. 100% local & private.",
  "author": "Attention Auditor",
  "permissions": [
    "tabs",
    "idle",
    "storage"
  ],
  "background": {
    "scripts": [
      "lib/aa.js",
      "background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "lib/aa.js",
        "content/toast.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_action": {
    "default_icon": {
      "48": "icons/icon.png"
    },
    "default_title": "Attention Auditor",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "page": "dashboard.html",
    "open_in_tab": true
  },
  "icons": {
    "48": "icons/icon.png",
    "96": "icons/icon.png",
    "128": "icons/icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "attention-auditor@arena.local",
      "strict_min_version": "89.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}