I compared this addon with "Tab ReTitle" (https://addons.mozilla.org/de/firefox/addon/tab-retitle/?utm_source=addons.mozilla.org&utm_medium=referral&utm_content=search).

This one is quite limited. The custom name is gone even if a small part of the URL changes (for example: you open a price comparison site and add another product). This way, it is not useful for me. The other addon "Tab ReTitle" has several options how persistent a new name should be.