Look up and summarize web content from a browser extension
A commenter built an agentic browser extension using Gemini that handles lookups on selected text or images and summarizes articles on a webpage.
Done withGemini
- What they did
- A commenter said they built their own agentic browser extension for Opera with Gemini as the agent, mainly so they could use Gemini without opening the web app. In practice, they trigger it from the page itself: selecting or right-clicking text or images to look things up, or right-clicking other page content to have it summarize an article; in a reply they said it was currently set up to use Gemini 2.5 Flash.
- How it went
- The thread gives no metrics or detailed evaluation; the reported result is simply that the extension handled lookups and page summarization inside the browser. It also doesn’t describe any human review step beyond the user choosing what to click on.
- Worth knowing
- The clearest implementation detail is that their version was built for Opera and, at the time of the comment, used Gemini 2.5 Flash rather than a computer-use model.
Try it yourself with Gemini
On the page I'm viewing, look up the text or image I've selected and give me a short explanation with [number] trustworthy sources. Then summarize the whole article in [number] bullet points, noting the main claim and any weak spots. Finished means I get both the lookup and the summary in the side panel, and you do not click away or submit anything without asking.
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Source: Reddit · Undated
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