[Jiaz]

Hi,

JDownloader does the following
1.) try to download the file and if it is okay, save to disk and reuse it till it gets deleted
1.1.) autorefresh does not exist yet
2.) if download failes, the favicon loader gets blacklisted for some time (to avoid dos) and then the blacklist gets removed and it will try again.

you can replace the icons with your owns if you want to.
we download the original favicon and use it for further uses and scale if needed. having the original favicon allows us to use best available quality.