Examine source code of Everykey for Firefox

{
  "icons": {
    "16": "icon16.plasmo.e7bcd3ac.png",
    "32": "icon32.plasmo.ce39377b.png",
    "48": "icon48.plasmo.3c17e113.png",
    "64": "icon64.plasmo.df317abe.png",
    "128": "icon128.plasmo.6a4310c5.png"
  },
  "manifest_version": 2,
  "browser_action": {
    "default_icon": {
      "16": "icon16.plasmo.e7bcd3ac.png",
      "32": "icon32.plasmo.ce39377b.png",
      "48": "icon48.plasmo.3c17e113.png",
      "64": "icon64.plasmo.df317abe.png",
      "128": "icon128.plasmo.6a4310c5.png"
    },
    "default_popup": "popup.html"
  },
  "version": "5.4.3",
  "author": "Kaz Okui <kaz.okui@everykey.com>",
  "name": "Everykey Browser Extension",
  "description": "Sign in effortlessly, generate passwords and passkeys, and store them securely. The Everykey browser experience.",
  "background": {
    "scripts": [
      "static/background/index.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "permissions": [
    "storage",
    "scripting",
    "tabs",
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "autofill.8f482b6a.js"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "css": []
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "injected.02124876.js"
      ],
      "run_at": "document_start",
      "all_frames": false,
      "css": []
    }
  ],
  "web_accessible_resources": [
    "assets/ek-*.png",
    "assets/*.jpg",
    "assets/*.json",
    "assets/google-10000-english-no-swears-4-to-8.txt",
    "password-manager-resources/quirks/shared-credentials*.json",
    "dialog.a0dbe6d4.html",
    "style.cccdc494.css",
    "dialog.0d840071.js",
    "alert-background.707928d6.jpg",
    "dropdown.f2ab8803.html",
    "dropdown.58d57ef2.js",
    "passkey.f601afe7.html",
    "passkey.1468ff6f.js"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "everykeyFirefox@everykey.com",
      "strict_min_version": "128.0"
    }
  }
}