Yes, the font visibility restriction will apply to people who don't have `privacy.fingerprintingProtection` flipped. However, the behavior only affects private browsing windows. It won't apply to the normal browsing windows.
We have tested the top tier sites and top designer sites. So far, we haven't found any font-related issues on those sites. So, we believe the protection won't affect the browsing experience of daily usage to average users. On Tue, Aug 29, 2023 at 7:53 PM Gijs Kruitbosch <[email protected]> wrote: > Does this apply even for people who have not flipped > `privacy.fingerprintingProtection`? And do we have a sense of how many > websites would be affected in terms of actually displaying differently as a > result? > > ~ Gijs > On 28/08/2023 10:06, Tim Huang wrote: > > We intend to enable font visibility restrictions in private browsing > windows from Fx118. To reduce entropy exposed by fonts, we restrict the > visibility of fonts to websites. The protection prevents websites from > accessing all non-system and non-langpack fonts. > > Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1849903 > > Standard: n/a > > Platform coverage: > It apply on all desktop platforms, including Windows, Mac, and Linux. We > won't cover Android momentarily, but we are working on it. > > Preference: > The font visibility restrictions in PBM is behind the pref > "privacy.fingerprintingProtection.pbmode". We will set this pref to true to > enable this protection in private browsing windows. For normal windows, > there is another pref called "privacy.fingerprintingProtection" to control > the behavior. > > This feature was previously discussed in this "Intent to prototype" > thread: > https://groups.google.com/a/mozilla.org/g/dev-platform/c/tKOOrYXDoHA/m/X4mj4nc-AgAJ > More information can be found there. > > -- > Tim Huang > Mozilla > email:[email protected] > > > -- > You received this message because you are subscribed to the Google Groups > "[email protected]" <[email protected]> group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/a/mozilla.org/d/msgid/dev-platform/CAFjL7ML8wJ8RiokqTYKZNNFGYk9t7jwUv0EqTqco%3Dn6KOvDonA%40mail.gmail.com > <https://groups.google.com/a/mozilla.org/d/msgid/dev-platform/CAFjL7ML8wJ8RiokqTYKZNNFGYk9t7jwUv0EqTqco%3Dn6KOvDonA%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > > -- You received this message because you are subscribed to the Google Groups "[email protected]" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/a/mozilla.org/d/msgid/dev-platform/CAFjL7MLOq6CSuyZcBnDnZ4TDOq1Eveo-Y88HYV0A08JE4MZr-A%40mail.gmail.com.
