Examine source code of Evernote Web Clipper Lite

{
  "manifest_version": 2,
  "name": "Evernote Web Clipper Lite",
  "version": "1.2",
  "description": "Clip web pages and save them to your Evernote account.",
  "permissions": [
    "storage",
    "activeTab",
    "https://www.evernote.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "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": "{5a640bc8-26c0-4bca-910f-0e41a0723d5e}"
    }
  }
}