User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:63.0) Gecko/20100101 Firefox/63.0 Steps to reproduce: If you visit https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/date Actual results: in firefox, the min - max do not prevent user input exceeding the values for instance max="9999-12-31" in chrome would only allow you to enter 4 digits as a year not 5, firefox will allow 6 but then just wont validate (makes the box red) Expected results: Hopefully firefox could look at chromes behaviour (I am on Chrome version 69.0.3497.100) and look at their input date parsing If you do a min="2012-01-01" and max="2012-12-31" chrome will actually *not* allow you to modify the year at all just enter mm - dd Same if you only want to allow a user to select a day in a month: min="2018-10-01" and max="2018-10-31" would only allow a user to select a day in October of 2018. I guess this is more of a feature request and a browsing experience upgrade for just date inputs I know this is probably not a priority but I really hope that Mozilla considers to implementing somewhat or same way of processing input date min and max as Chrome does, because it really improves the users experience instead of a red box. Sincerely, Pontus