I was sort of confused editing names of my service in a Firefox. This interface quite cleverly edits the name of the tab you're working on something like a second after you've typed a character. But doing so it unfocusses the name field. That's sort of counter intuitive, and when your next move in the text field would be to remove a character by backspace, your browser window flips back to the previous page. Makes you lose your work without a warning.
I know it's just a tiny detail, but maybe it's easy to fix by refocussing on the field after updating the tab's name?