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I have a requirement to login to multiple Salesforce orgs from the master org. One way is to use the SSO, are there any other ways to do it without SSO?
I don't think there are better ways than using SSO.
Check this idea https://ideas.salesforce.com/s/idea/a0B8W00000Gdb3xUAB/allow-users-to-access-multiple-orgs-without-logging-into-each-one-individually suggesting use of chrome extension as a workaround.
If this information helps, please mark the answer as best. Thank you