Missing support for the setupt pages-domain which is:
- salesforce-setup.com

I spent alot of time in the setup, so I really wish for this. The addon I used on chrome had this feature, so I know it's possible:)

Decent little add on, would give 5 star if it supported Bookmark Icon change as well as tab, was hoping for both.

Add-on works great, and makes determining which tab is in which Salesforce Org very easy!

Would it be possible to add support for the new Salesforce setup and experience cloud domains, as well as Salesforce Marketing Cloud?

The additional domains are:
site.com
salesforce-setup.com
salesforce-experience.com
exacttarget.com