manifest.json

{
  "manifest_version": 2,
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "name": "UTM Killer",
  "description": "This extension changes urls you are accessing on the fly, so if a url contains any utm_* style parameters, it's going to send random strings as their values ",
  "version": "1.0",
  "browser_action": {
    "default_icon": "icon.png"
  },
  "permissions": [
    "tabs",
    "webRequest",
    "webRequestBlocking",
    "*://*/*"
  ]
}