Version 2.6.8 of our Perfmatters WordPress plugin was released on September 9, 2026.
Changelog summary
- Added new Inline Excluded Stylesheets advanced option to automatically inline stylesheets excluded from Remove Unused CSS.
- Added new Safe Mode option to disable all Perfmatters performance optimizations sitewide without impacting security-related options or code snippets.
- Added new Load in Block Editor option for frontend CSS code snippets so those styles can also appear in the WordPress block editor canvas.
- Added new perfmatters_inline_scripts filter which allows you to inline specific local JavaScript files.
- Improved stylesheet inlining via the new perfmatters_inline_stylesheets filter (perfmatters_rucss_inline_stylesheets still supported), which can now run independently of Remove Unused CSS while still deferring to RUCSS for non-excluded stylesheets.
- Made some adjustments to code snippets UI visibility script.
- Moved Instant Page, Preconnect, and DNS Prefetch into the main Perfmatters queue so they respect the same request-level disable checks as other front-end optimizations.
- Removed redundant admin and ?perfmattersoff checks from FastClick output, which is already gated by the main Perfmatters queue.
- Fixed a PHP warning in Minify class when parse_url() returned false for a malformed script or stylesheet URL.
- Fixed a PHP fatal error that could stop buffer optimizations from running when one-per-line options were stored as a string instead of an array.
- Improved Remove Unused CSS to detect local stylesheets from the URL path, which should resolve most third-party CDN rewrites without needing the CDN URL setting or local stylesheet filter.
- Fixed an issue where Remove Unused CSS could delay, async, or remove external stylesheets that were never included in used CSS.
- Fixed get_file_path incorrectly stripping characters from asset paths on subdirectory installs in certain cases.
- Fixed a compatibility issue with Infinite Uploads that prevented code snippets from loading correctly.
- Fixed an issue where Perfmatters meta options were not available when creating a new post or page until after saving.
- Fixed an issue where code snippet filenames with non-ASCII characters (such as Korean) were incorrectly encoded on disk.
- Added missing license notices for bundled third-party libraries.
