There is no direct support to allow you to sign in via a single browser into 2 twitter accounts.

As soon as you navigate to twitter.com you should see that you are already logged into the account you most recently logged in to (assuming you didn't sign out).

The solution would be to use an application. There are many desktop and mobile applications that support multiple accounts.

To achieve this via web browsers you would need to make use of 2 browsers in your operating system.

There is no direct support to allow you to sign in via a single browser into two Twitter accounts.

As soon as you navigate to twitter.com you should see that you are already logged into the account you most recently logged in to (assuming you didn't sign out).

The solution would be to use an application. There are many desktop and mobile applications that support multiple accounts.

To achieve this via web browsers you would need to make use of two browsers in your operating system.