• Brand new UI that resembles familiar web developer tools. Lots of related improvements and fixes.
• Introduce some basic timing functionality in a Timings panel. See #282 for usage.
• Introduce a QM_NO_JQUERY constant for running QM without jQuery as a dependency.
• Greater resilience to JavaScript errors.
• Allow the Scripts and Styles panel to be filtered by host name.
• Expose information about redirects that occurred in HTTP API requests.
• Expose more debugging information for HTTP API requests.
• Don't enable the Capability Checks panel by default as it's very memory intensive.
• Allow PHP errors to be silenced according to their component. See qm/collect/php_error_levels and qm/collect/hide_silenced_php_errors filters.
• Hide all file paths and stack traces behind toggles by default.
• Remove support for the AMP for WordPress plugin.
• Add associative keys to the array passed to the qm/built-in-collectors filter.
• Drop support for PHP 5.2.
• Generally improve performance and reduce memory usage.