For the past 34 years, Joanna Firestone has resided in a cozy, 1,400-square-foot house northwest of Detroit, where she raised her son, lost her husband and grew older. Now 75 and retired, Firestone says she and others in the area are increasingly feeling the pinch of property taxes, which are straining budgets already hit by rising costs for utilities, groceries and home repairs. Although Firestone isn’t worried about being forced out of her home by tax bills, others are.