# Omarchy 4.0.5 cuts browser launch time by 86% with custom XDG replacement

> **Key takeaway:** Omarchy 4.0.5 replaces xdg-settings with a custom helper that finds the default browser in ~10 ms instead of ~72 ms.

**Published:** 2026-10-18T10:23:00+00:00 
**Source:** Phoronix Benchmarks & Drivers 
**Category:** kernel-os 
**Canonical URL:** https://fosswire.org/news/omarchy-405-cuts-browser-launch-time-by-86-with-custom-xdg-r.html 

## Summary
Omarchy 4.0.5, an Arch Linux-based distribution using Hyprland, shipped this weekend with Linux 7.2 and Qt 6.12. The standout change is a micro-optimization to default browser discovery: a new helper, omarchy-cmd-default-browser, bypasses the POSIX shell overhead of xdg-settings to read mimeapps.list directly. The project also improved shell bar performance on multi-monitor setups.

## How the browser launch optimization works
- **xdg-settings bottleneck**: The standard `xdg-settings get default-web-browser` call was taking ~72 ms due to layered POSIX shell scripts
- **Replacement helper**: `omarchy-cmd-default-browser` reads `mimeapps.list` directly from config directories, checking `hyprland-mimeapps.list` first
- **Fallback chain**: If no config-dir entry exists, falls back to `xdg-settings`, then `BROWSER` env var, then `xdg-mime` for https
- **Stale entry handling**: Skips entries whose `Exec` command no longer resolves, even if a system copy of the same entry exists
- **Bar optimization**: Separate improvement reduced shell bar load time from ~20 s to ~15 s on a six-monitor setup with many widgets

## Why it matters
The optimization highlights how desktop-agnostic XDG utilities can become performance bottlenecks for specialized distributions; Omarchy's approach of reading mimeapps.list directly may be worth watching for other Hyprland-focused projects.