I like the simplicity.

I couldn't guess whether overtyping 'MarkerNameHere' would (a) rename the marker; or (b) result in an invalid URL.

Also, re: https://framagit.org/ariasuni/tabcenter-reborn/issues/66 Tab Sidebar is is one of four (or more) extensions that use the same word, 'Tabs', in the sidebar.

Please, can you use a more distinctive phrase?

Thanks