Disable Ynet auto refresh

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "__MSG_appName__",
  "description": "__MSG_appDesc__",
  "short_name": "__MSG_shortName__",
  "default_locale": "en",
  "version": "1.0.1",
  "page_action": {
    "default_icon": {
      "19": "icons/19.png",
      "38": "icons/38.png"
    },
    "default_title": "Ynet refresh disabler"
  },
  "icons": {
    "16": "icons/16.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "http://www.ynet.co.il/*"
      ],
      "js": [
        "scriptDisabler.js"
      ],
      "run_at": "document_end"
    }
  ],
  "background": {
    "scripts": [
      "showIconScript.js"
    ],
    "persistent": false
  },
  "permissions": [
    "declarativeContent"
  ]
}