This extension is for AWS IAM Identity Center (The old name is AWS SSO). As for now, this extension is providing only following functions. You will see what am I using Account Name and Permission Set for current console at AWS console's header, AWS console header's color will almost be red if account name has 'Production' in it, and to bring favorite accounts to the top on the SSO login page. (You can customize header colors using regular expressions for account names on the extension option page. Favorites too.)
You just add this extension from chrome web store. You can also contribute to add your functions to this.