Breaking: #93182 - Changed file extension for gzip compressed files

See forge#93182


When using file compression for resources such as JavaScript or StyleSheets via $GLOBALS[TYPO3_CONF_VARS][FE][compressionLevel] or $GLOBALS[TYPO3_CONF_VARS][BE][compressionLevel] the generated files are now written via the file extension ".gz" instead of ".gzip" in previous versions.

TYPO3 follows the de-facto standard for compressed assets, as ".gz" is much more widespread than ".gzip" file extensions (see


Compressed resources are now generated and served via ".gz".

Affected installations

TYPO3 installations setting the global configuration option.


Adapt possible .htaccess or other webserver configuration files by replacing ".gzip" with ".gz" if this feature is activated.