Examine source code of Case Switcher

{
  "manifest_version": 3,
  "name": "Case Switcher",
  "version": "1.0.0",
  "description": "Transform text case with intelligence. Multi-language support for Title Case and smart capitalization.",
  "author": "Mycellium Tech <willian@mycellium.tech>",
  "homepage_url": "https://github.com/mycellium-tech/case-switcher",
  "permissions": [
    "contextMenus",
    "storage",
    "scripting"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": false
  },
  "commands": {
    "transform-uppercase": {
      "suggested_key": {
        "default": "Alt+Shift+1"
      },
      "description": "UPPERCASE"
    },
    "transform-lowercase": {
      "suggested_key": {
        "default": "Alt+Shift+2"
      },
      "description": "lowercase"
    },
    "transform-capitalize": {
      "suggested_key": {
        "default": "Alt+Shift+3"
      },
      "description": "Sentence Case"
    },
    "transform-titleCase": {
      "suggested_key": {
        "default": "Alt+Shift+4"
      },
      "description": "Title Case"
    },
    "transform-camelCase": {
      "suggested_key": {
        "default": "Alt+Shift+5"
      },
      "description": "camelCase"
    },
    "transform-kebabCase": {
      "suggested_key": {
        "default": "Alt+Shift+6"
      },
      "description": "kebab-case"
    },
    "transform-snakeCase": {
      "suggested_key": {
        "default": "Alt+Shift+7"
      },
      "description": "snake_case"
    },
    "transform-trimSpaces": {
      "suggested_key": {
        "default": "Alt+Shift+8"
      },
      "description": "Trim Spaces"
    },
    "transform-removeAccents": {
      "suggested_key": {
        "default": "Alt+Shift+9"
      },
      "description": "Remove Accents"
    },
    "transform-slug": {
      "suggested_key": {
        "default": "Alt+Shift+0"
      },
      "description": "URL Slug"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "case-switcher@mycellium.tech",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "48": "icons/icon-48.svg",
    "96": "icons/icon-96.svg"
  }
}