Lesson 63 of 1570
Browser Extensions — Claude for Chrome, Perplexity, and Friends
AI in your browser turns every webpage into something you can interrogate. Learn which extension to install, and why that access needs trust.
Lesson map
What this lesson covers
Learning path
The main moves in order
- 1Why AI moved into the browser
- 2browser extension
- 3Claude for Chrome
- 4Perplexity Comet
Concept cluster
Terms to connect while reading
Section 1
Why AI moved into the browser
Your browser is where you actually do most of your work. Email, docs, research, shopping. Moving AI into a chat window on a separate website costs you copy-paste friction. Browser extensions kill that friction — but they also ask for big permissions. Here's the tradeoff.
The big extensions in April 2026
Compare the options
| Extension | What it does | Where it lives | Cost |
|---|---|---|---|
| Claude for Chrome | Claude navigates pages, fills forms, drives tasks | Chrome only | Beta, Claude Max subscribers |
| Perplexity Comet | Whole browser with AI in every tab | Standalone browser | Free |
| ChatGPT search extension | Turns Chrome's search into GPT answers | Chrome, Edge | Free with account |
| Gemini in Chrome | Built-in Chrome AI overlay, summarize any tab | Chrome | Free, Pro for bigger models |
| Notion AI web clipper | Save web content into Notion with AI labels | Chrome, Firefox | Free with Notion |
What browser AI unlocks
- Summarize any long article in one click.
- Ask follow-up questions about the exact page you're reading.
- Fill repetitive forms (Claude for Chrome can do this reliably).
- Research a product across multiple tabs at once.
- Draft emails in Gmail using context from your browser tabs.
The Claude for Chrome workflow
A one-shot agentic browsing task. This kind of flow is why browser extensions are a leap beyond chat.
Example task you can hand to Claude for Chrome:
'Open my Gmail. Find the last 5 emails from my manager.
Summarize the action items across all of them into a bulleted list.
Draft a single reply that addresses the top three, mentions
that I'll handle the rest tomorrow, and sounds professional.'
Claude navigates Gmail, reads the threads, and composes the draft.
You review and click Send.Privacy reality check
- Extensions see page content by design — that's how they help.
- Most send page content to a cloud model for processing.
- Check the extension's privacy policy: does it store your data? Train on it?
- Consider a separate browser profile for AI extensions if you're cautious.
- Disable extensions temporarily on banking or health sites.
Which extension should you try first?
- 1Use Google Docs every day? Install Gemini in Chrome.
- 2Do deep research often? Try Perplexity Comet as your daily browser.
- 3Have Claude Max? The Claude for Chrome agent mode is a genuinely new capability.
- 4Just want summaries? Any of them work — they're roughly tied on that task.
“An extension without agency is a feature. An extension with agency is a small employee.”
Key terms in this lesson
The big idea: browser AI is the most natural place to use AI for research and work. Trade a careful slice of browser permissions for a big productivity lift — and always install from official sources.
End-of-lesson quiz
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Tutor
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