Examine source code of iCorrecter

{
  "manifest_version": 2,
  "name": "iCorrect",
  "version": "1.2",
  "description": "Auto capitalizes the letter 'i' when it stands alone or in specific contractions.",
  "permissions": [
    "activeTab",
    "storage",
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "contentScript.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{040e32d0-d75e-4892-86d2-59af34056145}"
    }
  }
}