Perfmatters 2.6.8

2.6.8 - 09.09.2026
- 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. […]

2.6.7 - 08.06.2026
- Removed the Script Manager MU Mode dependency on pluggable.php to avoid conflicts with SMTP and other plugins that override core pluggable functions.
- 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.
- 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.
- Hardened license form request verification.
- 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.