For Sync users looking for the setting:

Settings shortcut: General > Base font size

Of the many grievous faults of Windows to pick on, file system permissions like this are not one.

As admin you have permission to change ownership and override permissions. And a relic copy of the OS folder is going to have some of the most restrictive permissions possible.

I would expect similar behaviour on any modern OS.

I’m actually finding the experience in Chrome browser to be pretty good.

Definately waiting on Sync though.