Examine source code of Auto Capitalize Sentences

{
  "manifest_version": 2,
  "name": "Auto Capitalize Sentences",
  "version": "1.0",
  "description": "Automatically capitalizes the first letter of sentences as you type.",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_action": {
    "default_popup": "popup.html"
  },
  "options_page": "settings.html",
  "applications": {
    "gecko": {
      "id": "auto-capitalize-sentences@example.com",
      "strict_min_version": "91.0"
    }
  }
}