2026-01-08

The following plugins are part of this release:

Embed Optimizer (embed-optimizer), v1.0.0-beta3

Enhancements

• Add URL Metric mutation helpers to extension initialization API. (1951)
• Improve construction of inline scripts with sourceURL, hardened JSON encoding, and exporting JSON in separate script. (2169)

Image Prioritizer (image-prioritizer), v1.0.0-beta3

Enhancements

• Add URL Metric mutation helpers to extension initialization API. (1951)
• Improve construction of inline scripts with sourceURL, hardened JSON encoding, and exporting JSON in separate script. (2169)

Bug Fixes

• Allow background image URLs for file types the web server doesn't know about, e.g. when AVIF is sent as application/octet-stream. (1956)
• Remove responsive image sizes computation. (2109)

Optimization Detective (optimization-detective), v1.0.0-beta4

Enhancements

• Add URL Metric mutation helpers to extension initialization API. (1951)
• Add gzip compression for URL metrics using Compression Streams API. (1959)
• Allow disabling timestamp-based freshness checks by using negative TTL values. (1940)
• Bump web-vitals from 5.0.3 to 5.1.0. (2116)
• Change default garbage collection TTL of od_url_metrics posts from 1 month to 3 months and add the filter to customize expiration. (1950)
• Enhance Optimization Detective meta generator tag with all disabled reasons. (1979)
• Amend URL metrics to the generator meta tag content. (1954)
• Improve construction of inline scripts with sourceURL, hardened JSON encoding, and exporting JSON in separate script. (2169)
• Improve discoverability and user guidance for Optimization Detective extensions. (2261)
• Remove deprecated url_metrics_group_collection and class aliases and bump required OD version in Image Prioritizer. (1943)

Bug Fixes

• Avoid possible error when reading groups in debug mode. (2108)
• Delay loading detect module until page is loaded and idle. (2017)
• Ensure URL Metric is initially constructed with all elements prior to initializing extensions. (1968)
• Short-circuit detection when page is opened in background tab since web-vitals.js will not report LCP. (1927)

Performance Lab (performance-lab), v4.0.1

Bug Fixes

• Add notices and improved type checking for $wpdb->queries when attempting to compute server-timing for database queries. (2159)
• Skip stylesheets with empty href attributes in Site Health audit. (2281, 2328)
• Use proper escape function. (2246)

View Transitions (view-transitions), v1.1.2

Bug Fixes

• Include static page for posts for article transitions. (2306)

Modern Image Formats (webp-uploads), v2.6.1

Bug Fixes

• Add a simple PHP version check around a deprecated function. (2285)
• Fix missing PICTURE element support for post thumbnail and add missing Modern Image Formats support for Widget block. (2179)