According to Panopticlick, this actually made it worse - I was in a bracket where one in 5,000 browsers had my font set, with this extension one in 253,000 browsers had my font set. You can't change the false data it sends either, so you can't fit yourself into a more common font set.

There is a problem with notification. Desktop notification is disturbing. Better place is in the toolbar section.
Need option for staying on the same fingerprint until the tab is closed.

It works. Test it on webbrowsertools.com/font-fingerprint/

Works as described. Thanks you! :)