Examine source code of Snooze Tabs

{
  "manifest_version": 3,
  "name": "Snooze Tabs",
  "description": "Snooze tabs and todos for later. Dismiss tabs that you don't need now, and set an alarm to bring them back when you need them",
  "version": "2.4.4",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "author": "@snoozetabs",
  "homepage_url": "https://snoozetabs.com",
  "permissions": [
    "tabs",
    "storage",
    "unlimitedStorage",
    "notifications",
    "identity",
    "alarms",
    "contextMenus",
    "offscreen"
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; style-src 'self' 'unsafe-inline'; connect-src 'self' https://licensely.snoozetabs.com https://*.gleap.io wss://ws.gleap.io https://*.posthog.com https://*.i.posthog.com https://app.posthog.com https://oauth2.googleapis.com https://www.googleapis.com; frame-src 'self' https://*.gleap.io; img-src 'self' https: data:; media-src 'self' https://*.gleap.io;"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "iamkimhyung@gmail.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    }
  },
  "oauth2": {
    "client_id": "581542035719-qm78nkecttg463670brjavmga2ha83qm.apps.googleusercontent.com",
    "scopes": [
      "https://www.googleapis.com/auth/userinfo.email",
      "https://www.googleapis.com/auth/drive.file"
    ]
  },
  "commands": {
    "later-today": {
      "suggested_key": {
        "default": "Alt+Shift+S",
        "mac": "MacCtrl+Shift+S"
      },
      "description": "Snooze tab for later today"
    },
    "this-evening": {
      "suggested_key": {
        "default": "Alt+Shift+E",
        "mac": "MacCtrl+Shift+E"
      },
      "description": "Snooze tab until this evening"
    },
    "tomorrow": {
      "suggested_key": {
        "default": "Alt+Shift+T",
        "mac": "MacCtrl+Shift+T"
      },
      "description": "Snooze tab until tomorrow"
    },
    "tomorrow-evening": {
      "description": "Snooze tab until tomorrow evening"
    },
    "this-weekend": {
      "suggested_key": {
        "default": "Alt+Shift+W",
        "mac": "MacCtrl+Shift+W"
      },
      "description": "Snooze tab until this weekend"
    },
    "next-week": {
      "description": "Snooze tab until next week"
    },
    "next-month": {
      "description": "Snooze tab until next month"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "Snooze Tabs",
    "default_popup": "popup.html"
  }
}