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Re: [csswg-drafts] [css-fonts] limit local fonts to those selected by users in browser settings (or other browser chrome) (#4497)

From: Myles C. Maxfield via GitHub <sysbot+gh@w3.org>
Date: Sat, 14 Dec 2019 18:31:40 +0000
To: public-css-archive@w3.org
Message-ID: <issue_comment.created-565740944-1576348299-sysbot+gh@w3.org>
> What about - for the sake of privacy - getting vendors, aka Mozilla, Google, Apple, Microsoft, Opera, together and just ship a standard set of fonts

Putting aside licensing concerns, I wish we could do this, but alas, one of the goals Apple has is to minimize the size of the image that users have to download in order to upgrade their OS. Fonts have been a target for minimization of this image. Indeed, we avoid shipping some large fonts with the OS image to users which are unlikely to ever need those fonts. Realistically, we wouldn't increase the size of the OS image because some other browser, unrelated to us, wanted to include some font. Any such font would, by definition, be a font which we had previously judged as unnecessary for the OS, and which we had already made a decision to omit.

> it's not that clear on macOS

Indeed; @frivoal is incorrect in his assumption that all users who buy a particular version of macOS get the same set of preinstalled fonts. As mentioned in the previous paragraph, we will customize the set of preinstalled fonts depending on a user's locale. However, the set of possible buckets a user could be in is quite small - way, way smaller than the amount of entropy that would be exposed to the web if we had not implemented Safari's behavior.


I wrote a "[font taxonomy](https://drafts.csswg.org/css-fonts-4/#font-taxonomy)" in fonts level 4, which defined a user-installed font as:

> installed by an explicit action by the user, such as clicking an "Install" button or copying a file into a particular directory on their device. 

I believe this definition offers one unambiguous way to discern between user-installed fonts or not. (I'm not trying to say that this definition is the best possible definition to be used for the purpose of this GitHub issue; I'm just trying to make an existence proof that it is possible to come up with an unambiguous definition which could be used here.)

GitHub Notification of comment by litherum
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Received on Saturday, 14 December 2019 18:31:42 UTC

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