... de quelques fichiers dans le cache de firefox

$ file $FIREFOX_PROFILE/Cache/* | cut -d\ -f2- | sort | uniq -c | sort -nr | head -10
24 JPEG image data, JFIF standard 1.01
17 HTML document text
6 JPEG image data, JFIF standard 1.02
6 JPEG image data, JFIF standard 1.01, comment: "CREATOR: gd-jpeg v1.0 (using IJ"
5 gzip compressed data, from Unix
5 gzip compressed data, from FAT filesystem (MS-DOS, OS/2, NT)
4 ASCII C++ program text
4 ASCII C program text
3 Zip archive data, at least v1.0 to extract
2 UTF-8 Unicode C program text
$