Edit File: heif.xml
<?xml version="1.0" encoding="UTF-8"?> <mime-info xmlns='http://www.freedesktop.org/standards/shared-mime-info'> <mime-type type="image/heif"> <comment>HEIF image</comment> <comment xml:lang="de">HEIF-Bild</comment> <glob pattern="*.heic"/> <glob pattern="*.heif"/> <alias type="image/heic"/> </mime-type> </mime-info>