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Kagi has that feature as well: https://help.kagi.com/kagi/ai/summarize-page.html

Difference being this is in Chrome and not the Search page.

True, best to use a bookmarklet, works in most browsers, e.g.

javascript:(function()%7Bwindow.location.href%20%3D%20%22https%3A%2F%2Fkagi.com%2Fsummarizer%2Findex.html%3Furl%3D%22%20%2B%20document.URL%20%2B%20%22%26target_language%3D%26summary%3Dsummary%22%7D)()%3B

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