Examine source code of Stylish Font Generator

{
  "manifest_version": 2,
  "name": "Stylish Font Generator",
  "short_name": "StylishFont",
  "version": "1.0.0",
  "description": "Create Stylish Font and Custom Fonts With Ease.",
  "browser_specific_settings": {
    "gecko": {
      "id": "stylishfont@stylishfont.io",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "permissions": [
    "activeTab",
    "clipboardWrite",
    "storage"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "StylishFont Generator",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+F",
        "mac": "Command+Shift+F"
      },
      "description": "Open StylishFont"
    }
  }
}