Can I have 2 accounts on one computer and how to do it?

Hi! I have a little problem. My sister and I want to play on two different accounts from one computer. How do it?

Simply using two different browsers should probably do the trick. I can't imagine this falls under the multiple accounts rule since your playing strengths will probably be noticably different and you won't farm one another.

Just create a second account? "I" have two accounts, one for myself, one for my son. Also I think it's perfectly fine to have a blindfold account for example. I never use different browsers and it's all on the same computer.

A different browser won't matter it's based on your IP address.

Technically you can't run two accounts from the same IP unless you verify they are used by two different people, but for the most part no one ever cares about this rule. Unless your one of the few unlucky people who the mods happen to notice and decide to close your account .

Does your sister have a different email adress than yours or do you share the same?
I used to have 3 accounts at the same time (but I closed all of them in the end) but I had 3 different email adress (as they ask it when you create a new account).
If you share the same email adress, ask her to create a gmail account (it's easy, you just have to follow the steps)

I was merely suggesting different browsers so you won't have to logout and log back in all the time.

Thanks to all the problem was solved!

Just have different usernames and passwords. When you're done using lichess, log out. When she's ready to use it, she can log in.