Examine source code of Secure My Pass

{
  "manifest_version": 3,
  "name": "Secure My Pass",
  "version": "1.6.5",
  "description": "Secure My Pass addon.",
  "permissions": [
    "activeTab",
    "tabs",
    "storage",
    "cookies",
    "clipboardWrite",
    "management",
    "declarativeNetRequest",
    "declarativeNetRequestWithHostAccess"
  ],
  "sidebar_action": {
    "default_title": "Securemypass",
    "default_panel": "sidePanel.html"
  },
  "action": {
    "default_title": "Click to open",
    "default_icon": {
      "16": "icons/16x16.png",
      "48": "icons/32x32.png",
      "128": "icons/96x96.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "addon@securemypass"
    }
  },
  "web_accessible_resources": [
    {
      "resources": [
        "assets/webContentScript.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    },
    {
      "resources": [
        "assets/gsiClient.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "assets/contentScript.js"
      ],
      "run_at": "document_start"
    }
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "assets/background.js"
    ]
  }
}