Examine source code of bitpass

{
  "browser_specific_settings": {
    "gecko": {
      "id": "ram4@sigmoidfrogs.com",
      "strict_min_version": "43.0"
    }
  },
  "description": "This is a Firefox extension for Bitpass.",
  "version": "2.0",
  "manifest_version": 3,
  "name": "Bitpass",
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "24": "img/icon24-blue.png",
      "32": "img/icon32-blue.png",
      "64": "img/icon64-blue.png",
      "128": "img/icon128-blue.png"
    }
  },
  "background": {
    "scripts": [
      "background.bundle.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "contentScript.bundle.js"
      ],
      "css": [
        "content.styles.css",
        "injectIframe.styles.css"
      ],
      "all_frames": true,
      "run_at": "document_end"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "img/*",
        "fonts/*"
      ],
      "matches": [
        "<all_urls>"
      ]
    },
    {
      "resources": [
        "injectScript.bundle.js",
        "inject.styles.css",
        "injectIframe.styles.css"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "optional_permissions": [
    "<all_urls>"
  ]
}