How to download one file clear — this is, for example, the extension for Firefox, but how to download all mp3 and polybona ("In contact" there are albums, if anyone knows), i.e. to the hard drive all the music was distributed in folders? Anyone knows any extension for browsers, online service or program for this purpose? If there are none (and I have not found), not just because I write on Habr: can anyone write such an extension or program? I think she will be in demand.