Examine source code of Linux Permissions

{
  "manifest_version": 3,
  "name": "Linux Permissions",
  "version": "1.0.0",
  "description": "A Firefox add-on to analyze, calculate, and learn about Linux file permissions (symbolic, octal, binary, special bits).",
  "permissions": [],
  "action": {
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "linux-permissions@xai-addon"
    }
  }
}