Spanish Special Characters

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Spanish Special Characters",
  "version": "0.0.0.3",
  "description": "An extension to easily copy and paste spanish special characters",
  "browser_action": {
    "default_popup": "index.html"
  },
  "icons": {
    "48": "48.png",
    "128": "128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "js": [
        "charfi.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}