Examine source code of Cryptext

{
  "manifest_version": 2,
  "name": "Cryptext",
  "version": "2.1resigned1",
  "description": "Encrypts and decrypts text using various encoding methods.",
  "icons": {
    "48": "icons/ct-48.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "crypt_functions.js",
        "content_script.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": "icons/ct-48.png",
    "default_title": "Cryptext",
    "default_popup": "panel/panel.html"
  },
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "contextMenus",
    "activeTab",
    "clipboardWrite",
    "storage",
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b1b44d90-949c-45cb-b9cc-43c1bc8eede3}"
    }
  }
}