Examine source code of Quick Zoom Controller

{
  "manifest_version": 2,
  "name": "Quick Zoom Controller",
  "version": "1.0",
  "description": "One-click controls to zoom in, zoom out, and reset zoom on the current tab.",
  "permissions": [
    "tabs"
  ],
  "browser_action": {
    "default_title": "Quick Zoom Controller",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0cbdd5b6-1688-402e-9789-850ea113e215}"
    }
  }
}