Looks like browser versions newer than newest version they have in the data files get 0 days. https://github.com/witoff/BrowserAge/blob/master/data/age-msie.jso

Looks like browser versions newer than newest version they have in the data files get 0 days. https://github.com/witoff/BrowserAge/blob/master/data/age-msie.json https://github.com/witoff/BrowserAge/blob/master/data/age-ms... doesn't have IE10 mentioned in the other post, https://github.com/witoff/BrowserAge/blob/master/data/age-opera.json https://github.com/witoff/BrowserAge/blob/master/data/age-op... doesn't have Opera 12.02.