Examine source code of URL Clutter remover

{
  "manifest_version": 2,
  "name": "ref remover",
  "version": "1.0.1",
  "description": "Removes unnecessary clutter from links when copying. Click the icon in the toobar to copy the url.",
  "permissions": [
    "tabs"
  ],
  "background": {
    "scripts": [
      "ref_remover.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/16.png",
      "32": "icons/32.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{05418285-9a56-4f7e-ace8-967b2fe7fa47}"
    }
  }
}