well, I did little research and it appears to me that it does work (according to this page). Though I can not read what I believe is Portuguese I know their running GNU/Linux and lsusb detects the device and they have the picture of it working on the pi.....

On Wed, Jun 3, 2015 at 5:42 PM, Michael Havens <bmike1@gmail.com> wrote:

a couple of months ago I got a pi with a comfast usb wireless adapter. Now I was asked on list which one it was because apparently usb wireless adapters that work with linux are a rarity.
Well, because I am moving to Florida I do not know if I will be able to run ethernet cable in my new place to hard wire the tower to the network so I got another adapter. I got it today and plugged it in and after I finally figured out how to access it (with the network connection icon) I am happy to report that GNU/Linux does indeed work with Comfast. It has a white top if you look for it here.
Now the one I have is the cf-wu810n but it appears they no longer sell that one. I do not know if the one in my link works. I'm sure someone is selling the 810 elsewhere!
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:-)~MIKE~(-:

:-)~MIKE~(-: