I'm trying to use CSS to change the icon and name that is displayed on Firefox's "Add-ons" tab (I'm using pre-Quantum Firefox - ESR v52.9). I can't seem to find a way to only affect the Add-ons tab's icon because that tab doesn't have a unique ID, and so any changes that I make inadvertently affects the icons of all tabs, not just the Add-on tab. I have been able to isolate the TEXT for the Add-ons tab by using .tabbrowser-tab [value="Add-ons Manager"] but I'm not sure of the "after" syntax to use to replace the default tab name with a different name. Any help would be much appreciated. Thank you.