is it possible to set a startup url while install by command line options

[Admini]

I found that portable version can not support gmail multiple accounts, do you have any solution?

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all right, portable version do support multiple accounts, but can not support accounts that based on SSO(single sign on), when I add the second account, it always redirect me to the default account that already signed in, but when I add a normal google account without SSO, it is just fine...

Are you using multilogin tabs?