fix(styles): update age styles to work properly in latest Firefox
fix(styles): update age styles to work properly in latest Firefox

shane-tomlinson/fxa-content-server,vladikoff/fxa-content-server,vladikoff/fxa-content-server,mozilla/fxa-content-server,vladikoff/fxa-content-server,swatilk/fxa-content-server,swatilk/fxa-content-server,shane-tomlinson/fxa-content-server,mozilla/fxa-content-server,swatilk/fxa-content-server,mozilla/fxa-content-server,shane-tomlinson/fxa-content-server