Examine source code of Glagolitic Web

{
  "manifest_version": 2,
  "name": "Glagolitic Web",
  "version": "1.0",
  "description": "Replaces latin characters with their corresponding glagolitic characters.",
  "permissions": [
    "<all_urls>"
  ],
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "commands": {
    "log_hello_world": {
      "suggested_key": {
        "default": "Alt+Shift+8"
      },
      "description": "Toggles between latin and glagolitic."
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8a89bfe3-4af4-42a3-8296-dd6f66edf26d}"
    }
  }
}