Examine source code of Discrypt2

{
  "manifest_version": 2,
  "name": "Discrypt",
  "version": "2.1.10resigned1",
  "author": "dzr",
  "description": "Encrypts and decrypts Discord messages using sharable keys.",
  "icons": {
    "16": "img/icon16.png",
    "32": "img/icon32.png",
    "128": "img/icon128.png"
  },
  "background": {
    "scripts": [
      "jquery.min.js",
      "cryptico.js",
      "discrypt.js"
    ]
  },
  "content_scripts": [
    {
      "js": [
        "jquery.min.js",
        "content.js"
      ],
      "matches": [
        "*://discordapp.com/*"
      ],
      "run_at": "document_end"
    }
  ],
  "web_accessible_resources": [
    "img/icon16.png"
  ],
  "permissions": [
    "*://discordapp.com/*",
    "storage",
    "webRequest",
    "webRequestBlocking",
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ec4fffe0-0871-4b25-86d5-c777a559166f}"
    }
  }
}