Please add a context menu for the Kagi Summarizer browser extension, like you did for Kagi Translate:

At the moment, you can only summarize a full page (submit a URL), which will fail at many places, e.g.,
- pages behind a login wall
- other places in the browser, like the built-in Vivaldi Mail app
Adding a context menu will allow you to just select text in any given window, right-click and get a summary for it, without the need of copy / pasting the tab manually into an open Summarizer window.