Examine source code of Job Application Tracker

{
  "manifest_version": 3,
  "name": "__MSG_appName__",
  "description": "__MSG_shortDesc__",
  "version": "0.1.1",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "64": "icon/64.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "default_locale": "en",
  "permissions": [
    "storage",
    "activeTab",
    "scripting"
  ],
  "action": {
    "default_title": "Job Tracker",
    "default_icon": {
      "16": "icon/16.png",
      "32": "icon/32.png",
      "48": "icon/48.png"
    },
    "default_popup": "popup.html"
  },
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Alt+Shift+J"
      }
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "job-application-tracker@simpletask.dev",
      "data_collection_permissions": {
        "required": [
          "websiteContent"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}