Hummingbird Performance – Cache & Page Speed Optimization for Core Web Vitals | Critical CSS | Minify CSS | Defer CSS Javascript | CDN

3.20.0 ( 2026-07-20 )

New: Improved error messaging when generating Critical CSS while site is in maintenance mode

Improvement: Refactored Safe Mode architecture with a centralized Safe Mode controller

Improvement: Improved Clear Cache button UX in admin area

Improvement: PHP 8.5 compatibility

Improvement: Prevent WordPress assets (e.g. dashicons) from loading in Asset Optimization when only needed for logged-in users

Improvement: Improved Asset Optimization compatibility with TranslatePress frontend editor

Improvement: Improved Critical CSS exclusion handling for Elementor

Improvement: Show confirmation notice when clearing individual cache types from the admin bar

Improvement: Show success message when “Clear Cache” is triggered from file change detection notice

Fix: Enable WPMU DEV CDN toggle in Settings not changing state

Fix: File location in Asset Optimization Settings saves after adding input

Fix: Asset Optimization including non-existent CSS files

Fix: Asset Optimization filters displaying assets incorrectly when WooCommerce and Advanced Coupons for WooCommerce are active together

Fix: Configs not including all Asset Optimization and Exclusion Optimization settings and exclusions

Fix: Outdated Defender bot trap URL being cached, causing 404 errors and bypassing bot protection

Fix: Incorrect script loading order and Asset Optimization not detecting some scripts

Fix: Extension search feature in Asset Optimization Dev Mode filter not functioning correctl