[tor-qa] TBB 3.5rc1 try #5

[Sherief Alaa]

On Thu, Dec 12, 2013 at 8:28 PM, Mark Smith <mcs at pearlcrescent.com> wrote:

> On 12/12/13 12:23 PM, Sherief Alaa wrote:
>
>> On Thu, Dec 12, 2013 at 7:07 PM, Tom Ritter <tom at ritter.vg
>> <mailto:tom at ritter.vg>> wrote:
>> ...
>>
>>     Then a .onion gave me the same canvas popup, which seemed weird.
>>     Screenshot: http://imgur.com/SYtmONO
>>
>>
>> I do get the same popup too but I never allow it. Sorry for not
>> reporting this.
>>
>
> It looks like https://duckduckgo.com/ and http://3g2upl4pq6kufc4m.onionboth use JS code that calls canvas.getContext("2d").getImageData().
> Search for getImageData in https://duckduckgo.com/d1050.js.  I guess
> someone is trying to determine if font smoothing is being used by the
> browser; I can't say why.
>
> But that is what is triggering the prompt.
>
>
I get this popup a lot on youtube too.

-- 
Sherief Alaa
pgp 0x8623B882
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.torproject.org/pipermail/tor-qa/attachments/20131212/f5d4d5bc/attachment.html>