Examine source code of TextObfuscator

{
  "manifest_version": 2,
  "name": "TextObfuscator",
  "version": "0.2.1",
  "description": "Obfuscates text",
  "homepage_url": "https://addons.mozilla.org/addon/textobfuscator/",
  "applications": {
    "gecko": {
      "id": "{0e1197f9-2b8a-45ad-81e5-1022eb55f26c}"
    }
  },
  "permissions": [
    "activeTab",
    "storage",
    "downloads"
  ],
  "icons": {
    "16": "icons/pop.svg",
    "32": "icons/pop.svg",
    "48": "icons/pop.svg",
    "96": "icons/pop.svg"
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/pop.svg",
      "32": "icons/pop.svg",
      "48": "icons/pop.svg",
      "96": "icons/pop.svg"
    },
    "default_title": "TextObfuscator",
    "default_popup": "popup/menu.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content/obfuscate.js",
        "content/table.js",
        "content/common.js"
      ]
    }
  ],
  "options_ui": {
    "page": "settings/settings.html"
  }
}