ext_conf_template.txt

  # cat=basic; type=string; label=Image upload folder: Specify the name of the image upload folder. Default is 2:/tx_srfeuserregister/ since TYPO3 CMS 8 LTS.
uploadFolder = 2:/tx_srfeuserregister/

  # cat=basic; type=string; label=Allowed image types: Specify the list of acceptable file extensions for the front end user images. Default is gif,jpg,jpeg,tif,tiff,bmp,pcx,tga,png,ai,svg.
imageTypes = gif,jpg,jpeg,tif,tiff,bmp,pcx,tga,png,ai,svg

  # cat=basic; type=int+; label=Maximun image size: Specify the maximum size of uploaded image files, in number of KB's. Default is 7168.
imageMaxSize = 7168