Examine source code of Passwordstate Password Manager

{
  "name": "Passwordstate",
  "description": "Passwordstate for Firefox is a free form filler extension that obtains credentials from Passwordstate.",
  "short_name": "PasswordstateFirefox",
  "version": "10.0.0.28",
  "manifest_version": 2,
  "icons": {
    "16": "images/icon_16x16.png",
    "48": "images/icon_48x48.png",
    "128": "images/icon_128x128.png"
  },
  "commands": {
    "generate": {
      "suggested_key": {
        "default": "Alt+G",
        "mac": "Command+Shift+G"
      },
      "description": "Opens Generate Password screen in new tab"
    },
    "passwordstatewebsite": {
      "suggested_key": {
        "default": "Alt+P",
        "mac": "Command+Shift+P"
      },
      "description": "Opens Passwordstate website in new tab"
    },
    "enableautofill": {
      "suggested_key": {
        "default": "Alt+T",
        "mac": "Command+Shift+T"
      },
      "description": "Toggles Auto-Fill"
    },
    "autofillform": {
      "suggested_key": {
        "default": "Alt+A",
        "mac": "Command+Shift+A"
      },
      "description": "Auto-Fills form"
    }
  },
  "permissions": [
    "storage",
    "tabs",
    "activeTab",
    "http://*/*",
    "https://*/*",
    "clipboardWrite",
    "idle"
  ],
  "background": {
    "page": "background.html"
  },
  "browser_action": {
    "default_icon": "images/icon.png",
    "default_popup": "preferences.html"
  },
  "web_accessible_resources": [
    "js/fido2/passwordless.min.js",
    "savepasskey.html",
    "js/savepasskey.min.js",
    "getpasskey.html",
    "js/getpasskey.min.js"
  ],
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "js/jquery-3.5.1.min.js",
        "js/password_manager.min.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "@passwordstate"
    }
  }
}