Notifications on multiple tabs.

Status:

I have like 15 youtube tabs going at one time. When a notification comes in, all 15 tabs now show a (1) in front of the tab name. When I click on the notification bell, the (1) only disappears on that one tab. Can you make all (1)'s on all tabs disappear?? It saves me the trouble of going to each of the remaining 14 tabs and clicking on all of them to make them all disappear. Thanks...