First off, I have to say that I do like the new UI, regardless of the
impetus for the change.
However, I'm also not entirely sold that this has a strong impact on
user security. I doubt the practicality of such an attack, since you
would have to reasonably match:
* The OS native theme.
* The browsers chrome elements and theme.
* Basic browser chrome functionality and behavior.
* Have the user overlook that the browser just flipped out when visiting
a site or clicking a link.
Fortunately for the user, the first two aspects are incredibly easy to
change. For example, when I tried the proof of concept, my browser theme
went from light grey to dark gray and all of the toolbars - and their
contents - changed. If a malicious site is able to accurately capture
the state of, and reproduce, the desktop and browser chrome, I'd say
that is a much more serious issue than triggering full screen.
For me, the biggest issue with this attack is getting the user to ignore
the browser spontaneously maximizing/full screening, witch is rather
jarring. I expect most users will only intentionally enter full screen
when playing a game or watching a video, so having the browser do it on
it's own would hopefully be enough of a red flag. But if you can get the
user to ignore that, then they're probably also going to ignore, or be
oblivious to the full screen notification.
I will grant that there is a large number of users that do not make
cosmetic changes to their OS or Firefox, so they would be much more
susceptible to an attack like this. But these user are also not likely
to want a knob to turn off the notification.
So, implementing a option, per site or globally, to turn off this nag
doesn't seem like an entirely unreasonable request. I know I certainly
would turn it off.
On 08/16/2015 11:53 PM, Eric Rescorla wrote:
>
>
> On Sun, Aug 16, 2015 at 8:07 PM, Eric Shepherd <
eshe...@mozilla.com
> <mailto:
eshe...@mozilla.com>> wrote:
>
> I have to agree with Gavin here: the risk of this sort of attack
> occurring is very low,
>
>
> Do you have some evidence for this?
>
> -Ekr
>
> but the potential for annoying or confusing users with this
> presentation is, if not high, at least high enough to make it
> overkill. At least having a way (even if it's an about:config only
> thing) to drop this reminder once you have it through your head,
> would be helpful.
>
> Or what if we add a checkbox "don't show this again" BUT only
> after, say, ten times displayed. That way you can be sure they
> have seen the warning. Then when they opt to stop showing it, have
> a confirmation dialog remind them of the risk. From then on, they
> don't get the reminder.
>
> Eric Shepherd
> Sr. Technical Writer
> Mozilla
> Blog:
http://www.bitstampede.com/
> Twitter:
http://twitter.com/sheppy
>
> On Aug 16, 2015, at 9:38 PM, Gavin Sharp <
ga...@gavinsharp.com
> <mailto:
ga...@gavinsharp.com>> wrote:
>
>> I'm not making any statement as asinine as "there's no point
>> worrying about security", and it's frustrating that that's
>> something I would even have to clarify.
>>
>> Richard stated he thought the current solution had a "small
>> price" and I disagreed with him.
>>
>> This boils down to a classic security/usability tradeoff. Those
>> tradeoffs are ultimately matters of opinion, not fact, and need
>> to be made by estimating what is likely in addition to
>> understanding what is possible.
>>
>> None of us are the product owners responsible for making that
>> tradeoff, so having stated my opinion I'll defer to them.
>>
>> Gavin
>>
>> On Sun, Aug 16, 2015 at 6:16 PM, Chris Hofmann
>> <
chof...@mozilla.com <mailto:
chof...@mozilla.com>> wrote:
>>
>>
>>
>> On Sun, Aug 16, 2015 at 5:52 PM, Eric Rescorla <
e...@rtfm.com
>> <mailto:
e...@rtfm.com>> wrote:
>>
>>
>>
>> On Sun, Aug 16, 2015 at 5:49 PM, Gavin Sharp
>> it. But a 2-3 second box
>> > for each fullscreen transition seems like a small
>> price.
>> >
>> > --Richard
>> >
>> > On Sat, Aug 15, 2015 at 9:55 AM, Brian Smith
>> <
br...@briansmith.org <mailto:
br...@briansmith.org>>
>> wrote:
>> >
>> >> IIUC, the reminder is supposed to go away after a
>> few seconds. However, I
>> >> have experienced the case, many times, where the
>> reminder stays on screen
>> >> for the entire video. IIRC, if I restart the
>> browser and replay the same
>> >> video again, then the reminder goes away.
>> >>
>> >> HTH,
>> >> Brian
>> >>
>> >> On Sat, Aug 15, 2015 at 12:17 AM, Jared Wein
>> <
ja...@mozilla.com <mailto:
ja...@mozilla.com>> wrote:
>> >>
>> >> > Including dev-media and dev-security.
>> >> >
>> >> > On Fri, Aug 14, 2015 at 11:53 PM, Eric Shepherd
>> <
eshe...@mozilla.com <mailto:
eshe...@mozilla.com>>
>> <mailto:
firef...@mozilla.org>
>> <mailto:
dev-se...@lists.mozilla.org>
>> <mailto:
dev-se...@lists.mozilla.org>
>> <mailto:
dev-...@lists.mozilla.org>
>>
firef...@mozilla.org <mailto:
firef...@mozilla.org>
>>
firef...@mozilla.org <mailto:
firef...@mozilla.org>
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