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Many of you have asked, and we explain. Tor Browser ships with a defense called Letterboxing that prevent fingerprinting your screen dimensions. It adds margins to the window and it stops websites from identifying your exact screen size. Browse safely!

support.torproject.org/tbb/max

@torproject Do the margins change every time I visit another page?

@torproject
Such a great idea. I used to wonder about it but then when I learnt about it it made perfect sense.

@torproject
I been wondering about that as now the tor vrowser don't notefi me when i acedently fullscreen it at times

@torproject yeah, but EFF panopticlick still shows me as unique in Android :(

panopticlick.eff.org/

@torproject

Apparently it doesn't work for full-screen videos ?
Or is it not a prorblem ?

@torproject Will we at some point; be able to alter the colours of the margins?

Or is that nonviable security/privacy-wise?

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