Examine source code of syspass

{
  "description": "Add sysPass integration",
  "manifest_version": 2,
  "name": "syspass",
  "short_name": "sysPass Browser integration",
  "version": "1.6.8",
  "default_locale": "en",
  "homepage_url": "https://github.com/ochorocho/syspass-addon",
  "icons": {
    "48": "icons/icon-dark-48.png",
    "96": "icons/icon-dark-96.png"
  },
  "permissions": [
    "storage",
    "*://*/*",
    "activeTab"
  ],
  "options_ui": {
    "page": "options.html"
  },
  "background": {
    "scripts": [
      "polyfill.js",
      "background.js"
    ]
  },
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'",
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "polyfill.js",
        "syspass.js"
      ],
      "css": [
        "syspass.css"
      ]
    }
  ],
  "browser_action": {
    "default_icon": "icons/icon-dark-48.png",
    "theme_icons": [
      {
        "light": "icons/icon-light-48.png",
        "dark": "icons/icon-dark-48.png",
        "size": 48
      }
    ],
    "default_title": "sysPass",
    "default_popup": "popup.html"
  }
}