Examine source code of HashGen

{
  "manifest_version": 2,
  "name": "HashGen",
  "version": "1.0",
  "description": "Generate hashes (SHA-1, SHA-256, SHA-384, SHA-512) and Base64 encoding/decoding from text.",
  "permissions": [
    "activeTab",
    "clipboardWrite",
    "storage"
  ],
  "sidebar_action": {
    "default_title": "HashGen",
    "default_panel": "sidebar.html"
  },
  "browser_action": {
    "default_title": "Open HashGen Sidebar"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "commands": {
    "_execute_sidebar_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+H"
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content_script.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "hashgen@example.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}