Block font fingerprinting by default

[mozillian]

By default, fonts are the highest fingerprinting vector on Firefox. There should be a way to block font fingerprinting and i believe it should be enabled by default.

[Jon]

Thanks for submitting an idea to the Mozilla Connect community! Your idea is now open to votes (aka kudos) and comments.

[tomrittervg]

I am quite happy to report that we agree, and already do this!  As part of the Fingerprinting Protection feature we block fonts that are not in the default list for supported OSes, which includes macOS, Windows 10/11, and recent versions of Ubuntu and Fedora.

Fingerprinting Protection is on by default in Private Browsing Mode, and when you have enabled Strict Enhanced Tracking Protection. It's a feature we are working on improving, so we haven't publicized it as much, but as you said - font protection is a high priority item so we work ed on in the first round.

In the UI, you will find it labeled as 'Suspected Fingerprinters' and a few more details are at https://support.mozilla.org/en-US/kb/firefox-protection-against-fingerprinting (We are also writing an improvement to this page with more detail.)

[Jon]

Updating the status as this has been delivered — check out @tomrittervg's comment in the thread for more details.

Thanks again for sharing valuable product feedback and ideas here on Connect 🙌