Examine source code of KeyCrypt

{
  "name": "KeyCrypt",
  "version": "11.1.1",
  "description": "Tax Credential Manager",
  "author": "KloudTax Expertise",
  "permissions": [
    "tabs",
    "storage",
    "unlimitedStorage",
    "<all_urls>"
  ],
  "browser_action": {
    "default_popup": "browser/popup/popup.html",
    "default_title": "KeyCrypt"
  },
  "icons": {
    "16": "assets/images/icon16.png",
    "48": "assets/images/icon48.png",
    "128": "assets/images/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_idle",
      "js": [
        "browser/inject/inject.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "index.html",
    "browser/inject/**",
    "assets/images/logo.png",
    "assets/images/icon16.png",
    "assets/fonts/lexend.woff2"
  ],
  "background": {
    "scripts": [
      "browser/background.js"
    ]
  },
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "support@kloudtax.in",
      "strict_min_version": "60.0"
    }
  }
}