Chalkduster

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Chalkduster",
  "version": "0.1",
  "description": "Make you screen beautiful with chalkduster",
  "page_action": {
    "default_icon": {
      "16": "icon.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ]
}