Examine source code of QuirkCase

{
  "manifest_version": 2,
  "name": "QuirkCase",
  "version": "1.1",
  "author": "Leandro Araujo Gonzalez",
  "description": "Lets you WrItE lIkE tHiS eAsIlY. Just hold the ctrl key and click on a text field, and you will be prompted for your text.",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "QuirkCase.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b54a16d8-d964-437a-9312-a9f498dd1550}"
    }
  }
}