Install the plugin using the Plugin Manager and the download URL above, which points to latest version of the plugin. Refer to Plugins on how to install plugins manually.

Either set $conf["no_resize"] directly or in the Configuration Manager to a list of comma-separated values of image extensions to block from being resized on the server or all to block all server-side image resizing.

This is useful if you want to stop the server from resizing gifs, which will lose their animation properties when handled by the server.