Examine source code of GFX Developer Toolset

{
  "manifest_version": 2,
  "name": "GFX Developer Toolset",
  "version": "1.0",
  "description": "A set of helpful tools for web design and site development by GibsonFX",
  "permissions": [
    "activeTab",
    "tabs",
    "storage"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon48.png"
    }
  },
  "icons": {
    "48": "icon48.png",
    "128": "icon128.png",
    "256": "icon256.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ac7d66df-5408-40bb-9054-f42eba87ef17}"
    }
  }
}