This is literally the only reason why Firefox is still installed on my Macbook Pro. I have managed to switch completely to Chromium otherwise.
https://chrome.google.com/extensions/detail/bmagokdooijbeehm...
Was a real pain in the ass to fix, but despite these kinds of bugs I still can't help using Chrome for mac as my main web browser.
I'll take another look at my font libraries and setup to see if there's anything I can do.
I don't have FontExplorer installed...