Examine source code of Quick Theme Builder

{
  "manifest_version": 2,
  "name": "Quick Theme Builder",
  "version": "2.0.1",
  "description": "Build browser themes and launch the Quick Theme Builder page with presets, modules, and optional Quick List Solo integration.",
  "browser_action": {
    "default_title": "Quick Theme Builder",
    "default_icon": {
      "16": "icon-16.png",
      "32": "icon-32.png",
      "48": "icon-48.png"
    },
    "default_popup": "popup.html"
  },
  "permissions": [
    "storage",
    "theme",
    "topSites"
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true,
    "browser_style": false
  },
  "icons": {
    "16": "icon-16.png",
    "32": "icon-32.png",
    "48": "icon-48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "quick-theme-builder@ashforge",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "commands": {
    "open-qtb-page": {
      "suggested_key": {
        "default": "Ctrl+Shift+Y"
      },
      "description": "Open Quick Theme Builder page"
    }
  }
}