Added support for more web fonts in Lockdown Mode by replacing a fragile hard-coded allowlist with a safe parser that handles a broader range of fonts without compromising security.
Release Notes for Safari Technology Preview 218 | WebKit
[LDM] Re-enable SafeFontParser · WebKit/WebKit@304ec6b · GitHub
I wonder whether this new “safe” font parser is memory safe, like the new chromium font parser
It would also be nice to see it enabled for normal non-lockdown mode users, but it’s already good that Apple is addressing the most annoying? aspect of lockdown mode.