How to Rename Tabs?

With the recent switch to a lightweight client, it’s seemingly no longer possible to change name of tabs without signing in.

You have to save the tab before you can change the tab title. Saving seems to now require remote access via login. There seems to be no way to save requests in the working directory locally?

I don’t want to sign up. No signup means no saving, which means no tab title editing.

Am I missing something, or is this intended?