Examine source code of Noun-Save

{
  "manifest_version": 2,
  "name": "Context menu: Save svg from the noun project",
  "description": "Add a context menu option to save svg on the noun project webpage",
  "version": "1.1",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "48": "icons/border-48.png"
  },
  "permissions": [
    "activeTab",
    "contextMenus"
  ]
}