The popup in the toolbar doesn't work in renaming the tabs, you have to right click the actual tabs.

Perfect for what i was looking for, simple to use, simply right click on the tab and the option to rename appears right at the bottom of the pulldown list. Takes less than 5 seconds to do. Great add-on! Ty <3

Lets you rename a tab from the context menu (right click on the tab in the tab bar). The name persists for that tab through reloading, interacting, and navigating to other URLs - the tab keeps its name regardless of what is in it.