# TYPO3 Cachebuster Extension It adds a cachebuster to files referenced via FAL and Fluid Viewhelpers like f:uri.resource or f:image and makes it possible to savely set cache-control headers like ``` RewriteEngine On RewriteCond %{QUERY_STRING} ^. [NC] RewriteRule ^(fileadmin|uploads|typo3conf|typo3temp)/ - [E=SETCACHEHEADER:1] Header set Cache-Control "max-age=2592000" env=SETCACHEHEADER ``` Files in `fileadmin/_processed_` are cachable too, since file modifications to the original leads to a new processed file. So you can add ``` RewriteRule ^fileadmin/_processed_/ - [E=SETCACHEHEADER:1] ```