Examine source code of SVG Screenshot

{
  "manifest_version": 2,
  "name": "SVG Screenshot",
  "description": "Take scalable, semantic, accessible screenshots, in SVG format.",
  "version": "0.11.6",
  "permissions": [
    "activeTab",
    "<all_urls>",
    "storage"
  ],
  "icons": {
    "128": "images/icon_128.png",
    "256": "images/icon_256.png"
  },
  "web_accessible_resources": [
    "src/content.js"
  ],
  "browser_action": {
    "default_popup": "src/popup.html",
    "default_title": "Capture SVG screenshot",
    "default_icon": {
      "128": "images/icon_128.png",
      "256": "images/icon_256.png"
    }
  },
  "background": {
    "scripts": [
      "src/background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "svg-screenshots@felixfbecker"
    }
  }
}