Stay-Open Menu has been discontinued. Similar apps include Tab Utilities, which is free and open source. Other options are Tab Tally. Between them they cover Mac, Windows, Linux and self-hosting.
Open Bookmarks/History/Homepage/URL/Search in new tabs, and more utilities for tabbed browsing, including open tab next, focus related/last visited tab, protect/lock/faviconize/pin tab, multiple tab handler, tab clicking options, etc.
Displays how many tabs are open. The count includes tabs from all windows. Also indicates how many tabs actually have content loaded in them – for example, after restarting Firefox.
