Examine source code of SVG Grabber

{
  "manifest_version": 2,
  "name": "SVG Grabber",
  "version": "1.3",
  "description": "Grab, preview, and download inline SVGs from any webpage.",
  "permissions": [
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "SVG Grabber",
    "default_icon": "icons/logo_64.png",
    "default_popup": "popup.html"
  },
  "icons": {
    "32": "icons/logo_32.png",
    "64": "icons/logo_64.png",
    "128": "icons/logo_128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8570dfa1-9405-4862-894c-2e4b3c4af7a9}"
    }
  }
}