Launch the AWS Console from the CLI or a mobile phone

At ${DAYJOB} I happen to manipulate quite a few AWS accounts for different customers, and I find it really annoying to log out from one web console, to log into a new one, with the right credentials, account ids and MFA. Here you can read a good blog post on how to enable cross account access for third parties and use a basic script to open a web browser to switch from one account to the other.