private DateTime TimestampToDateTimeUtc(long timestamp)
{
// Firefox stores expiry timestamps as unix time seconds.
// DateTime is not capable of representing the same range of dates as the browser's timestamps.
if (timestamp > DateUtilities.ToUnixTimeSeconds(DateTimeOffset.MaxValue))
{
return(DateTime.MaxValue);
}
return(DateUtilities.FromUnixTimeSeconds(timestamp).DateTime);
}
private DateTime TimestampToDateTimeUtc(long timestamp)
{
// CHrome's epoch starts at 1601-01-01T00:00:00Z, and the timestamp is in nanoseconds:
// https://stackoverflow.com/a/43520042
long timestampSeconds = timestamp / 1000000;
timestampSeconds -= 11644473600; // 1601-01-01T00:00:00Z is 11644473600 seconds before the unix epoch
// DateTime is not capable of representing the same range of dates as the browser's timestamps.
if (timestampSeconds > DateUtilities.ToUnixTimeSeconds(DateTimeOffset.MaxValue))
{
return(DateTime.MaxValue);
}
return(DateUtilities.FromUnixTimeSeconds(timestampSeconds).DateTime);
}