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由 milix 发表于 Sept. 18, 2012 · 永久链接

Best YT (and others) downloader of all the ones I tried. It is simple and unintrusive, and the author seems to constantly keep it updated so it works again quickly every time the the sites change.

September 2012: version 2.50 didn't work anymore with YouTube, but 2.052beta (https://addons.mozilla.org/en-US/firefox/addon/unplug/versions/2.052beta) does work.