Examine source code of A Gentle Reminder

{
  "manifest_version": 2,
  "name": "A Gentle Reminder",
  "version": "3.5.0",
  "description": "Set your intention before you browse. Focus with purpose.",
  "browser_specific_settings": {
    "gecko": {
      "id": "agentlereminder@yesthings.in",
      "strict_min_version": "109.0"
    }
  },
  "permissions": [
    "storage",
    "alarms",
    "notifications",
    "tabs",
    "contextMenus"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Alt+Shift+F"
      },
      "description": "Open A Gentle Reminder"
    }
  }
}