Simple OTP Token Generator

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Simple OTP Token Generator",
  "version": "1.0.0.4",
  "manifest_version": 2,
  "description": "A simple extension for generating HOTP tokens for a single secret. Supports pasting a new token from right-click context menu.",
  "browser_action": {
    "default_icon": "assets/lock.png",
    "default_popup": "popup.html"
  },
  "background": {
    "persistent": false,
    "scripts": [
      "scripts/background.js",
      "scripts/key-utils.js",
      "scripts/lib/hotp.js",
      "scripts/lib/2.0.0-crypto-sha1.js",
      "scripts/lib/2.0.0-hmac-min.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "all_frames": true,
      "run_at": "document_start",
      "js": [
        "scripts/content.js"
      ]
    }
  ],
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'",
  "permissions": [
    "contextMenus",
    "activeTab"
  ],
  "icons": {
    "16": "assets/lock.png",
    "48": "assets/lock.png",
    "128": "assets/lock.png"
  },
  "options_ui": {
    "page": "options.html",
    "chrome_style": true
  },
  "commands": {
    "paste_otp": {
      "suggested_key": {
        "default": "Alt+T"
      },
      "description": "Paste OTP Token"
    }
  }
}