For my work I use different workspaces: personal, work (general), testing, administration and playground. Whenever I'm in opera I find it quite easy to keep this structure, but then I'm testing something and I see an email from jira, I open it, use the link in the email to go to the ticket and it opens in the workspace that I was last in.

I would love for an advanced setting where I can assign certain domains to certain workspaces.