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Re: [tor-talk] Tor Browser window size



On 7/24/2014 3:58 AM, Georg Koppen wrote:
Joe Btfsplk:

Should TBB always start in partial window size?
It depends on your available screen size. But in almost all cases, yes,
TBB should always start in partial window size at least until we find a
good way to deal with maximized browser windows (see e.g.:
https://bugs.torproject.org/7256).
Thanks Georg,
Clearly I've forgotten or never knew why (partial) TBB window sizes can be spoofed, but standard multiples for maximized TBB windows *can't* be spoofed, instead.

? Don't a "majority" of users maximize something like browsers, for general use? I've never seen it mentioned that most users leave TBB in partial screen. I wouldn't think TBB (window size) would be used differently than regular browsers (a result of human habit).

I rarely see people using browsers in partial size, unless doing some between app operation / comparison. I'm talking about what the masses do.
Vanilla Firefox starts in maximized mode, if that was the state when
closed (I think).
TBB always starts in partial screen mode, even if last closed while in
full screen.  Many apps remember the last screen size.
Is there an anonymity reason to have TBB  start in partial screen?
Not per se, but see https://bugs.torproject.org/7256 for the issue that
still needs to get solved first.

I don't understand your last statement in relation to the bug you linked:

Right now, we set the size of new Tor Browser windows such that their content area is a 200x100 multiple. We also lie to content that the entire desktop resolution is this size.

However, this potentially leaks information for users who maximize their browser windows, as such windows will no longer be rounded.
There, Mike P. is clearly saying that maximizing TBB window poses a threat (under the right circumstances). Am I misunderstanding it? But, I'm unclear on which sentence (current TBB behavior) causes potential info leak, *IF users maximize* TBB: The 1st sentence, "... content area is a 200x100...", or the 2nd one, "We also lie...." Or, both?
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