Version 2.6.7 of our Perfmatters WordPress plugin was released on August 6, 2026.
Changelog summary
- 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.
