The one I linked to, you open the index.html, click the plus sign button in the top left corner, use any name for the account name, put the secret key in that they gave you, and every 30 seconds it shows a new one time pass. You should wait until the clock resets to 30 and enter the new pass in the website in those 30 seconds.
TOTP is the Google one, not sure what HOTP is.
okay they gave me a qr code and url
url thing was
otpauth://totp/username%40CryptoCoin%20Exchange?secret=ABCDEFGHIJK
of course username was mine and the ABCDE was a unique code
to just take the part after secret= right?
that didn't work for the authentication things I tried...
Does it have to load in the same browser you're trying to logon to?