This issue was actually central to my switch to Chrome.
I'm glad it's finally fixed, but when something this important to UI takes over 10 years to get resolved, perhaps the Firefox team needs to just choose a fix (such as the ones suggested in that thread from 2002-2005) and fix any issues it causes in further releases.
I'm glad it's finally fixed, but when something this important to UI takes over 10 years to get resolved, perhaps the Firefox team needs to just choose a fix (such as the ones suggested in that thread from 2002-2005) and fix any issues it causes in further releases.