I was really (unpleasantly) surprised that the favicon did not change when I set a logo in Workspace Settings!
Using the logo as favicon will make finding tabs for workspaces easier and make shortcuts on mobile devices look a lot better. Especially if one has multiple tabs or bookmarks for multiple workspaces.
I’d rather the favicon didn’t change to match your custom logo. We have our company logo as the favicon on other websites, so I’d rather the Fibery favicon was the Fibery logo, to make it more visible/obvious in your stack of tabs. I could see the argument if you have multiple Fibery domains/sites, I guess.