Works good, but extremely annoying UI.

This adds a massive floating element to all webpages by default. You can make it smaller, but it's still on top of pages instead of better places built for add-ons, like the toolbar. Imagine if other extensions did it like this, it would be massively annoying. It's like the Clippy/BonziBuddy UI, just duller.

You can't summarize the things you usually want to summarize either, like links you haven't clicked on yet. That's probably the most useful use-case for summarization, "do I want to consume the contents on this link or is it clickbait?". This plugin can't do that, the UI is both intrusive and useless.

The Kagi extension has a WAY better UI (but the summarization itself is often broken unfortunately, so alternatives are needed.)