New

• 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.
• Added missing license notices for bundled third-party libraries.

Improved

• 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.
• 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.
• 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

• 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.
• 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.

Other

• Made some adjustments to code snippets UI visibility script.

New

• Added ABSPATH checks to plugin include files where needed.
• Added capability checks to Used CSS and Minify clear actions, and sanitized the Used CSS file type parameter.

Improved

• Removed the Script Manager MU Mode dependency on pluggable.php to avoid conflicts with SMTP and other plugins that override core pluggable functions.
• Improved license and update API request handling to reduce how often sites contact the Perfmatters server, including longer update check caching, cached license status checks, and a staggered retry delay after failed update requests.

Fixed

• Fixed an issue where Script Manager MU Mode could permanently deactivate plugins when another plugin (such as Freemius) wrote a filtered active_plugins list back to the database.
• Fixed an issue where Script Manager MU Mode could resolve some custom post type URLs to the wrong post ID.
• Fixed an issue where Fetch Priority would always use the first matched priority value when the same selector had separate device rules.

Other

• Hardened license form request verification.

Improved

• Improved code snippet docblock parsing to use UTF-8 aware regex when reading snippet metadata.
• Improved reliability of snippet metadata parsing across different server environments.
• Translation updates.

Fixed

• Fixed an issue with multiline code snippet descriptions not saving properly.
• Fixed an issue where the database optimization process button spinner was getting stuck without reloading the page.

New

• Added new perfmatters_rucss_delay_stylesheets filter which allows you to delay a specific stylesheet already excluded from used CSS.
• Added new load behavior option to delay CSS code snippets using the file print method.
• Added new code snippet URL-based conditions for path contains, path equals and path regex.
• Added additional support to code snippet search to allow the search value to match on the code input itself.
• Added default sort order controls to code snippet screen options.

Improved

• Adjusted main code menu behavior to return to return to the base code view if selected while viewing a single code snippet.
• Translation updates.

Fixed

• Fixed utility attribute encoding so certain characters are preserved instead of being converted to HTML entities.
• Fixed a possible JavaScript conflict with minimal analytics declaring variables in the global scope. The script is now wrapped in an IIFE for compatibility.
• Security update to improve escaping of Code Snippets list table admin links built from the current request URL.
• Security updates to add domain verification and content type validation to local Google fonts feature when downloading remote files.

Other

• Made a change to allow an image tag with a missing src attribute to still be able to lazy load if it has a valid srcset attribute.

Improved

• Translation updates.

Fixed

• Security updates to improve PMCS admin output sanitization and query handling across snippet editor and list views.