Run Your JavaScript

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Run Your JavaScript",
  "description": "An empty extension, you run your own JavaScript in it.",
  "version": "0.3.3",
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'",
  "permissions": [
    "*://*/*",
    "storage",
    "tabs",
    "notifications",
    "downloads",
    "<all_urls>",
    "webRequest",
    "webRequestBlocking"
  ],
  "icons": {
    "16": "icon.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_action": {
    "default_title": "Run Your JavaScript",
    "default_icon": "icon.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  }
}