Do we know that any lives have been saved as a result of flame retardants being used in furniture?
The article suggests that flame retardants do not slow down furniture fires in real world scenarios. The problem is that they are used in only the foam padding. The couch fabric is not treated. The foam itself appears to offer little resistance to fire if it is already covered in flames (like if fabric is on fire). This is where more research is needed.
If the chemicals don't slow down furniture fires and save lives, then there is no value to having them inside foam.