What network calls do Chrome extensions actually make?

This is the problem. Without a tool like Little Rat, users have no way to see what domains their extensions contact, what data they send, or how often. Extensions with 'read all site data' permission can silently transmit anything.

What is Little Rat and why doesn't it solve this problem for regular users?

Little Rat is a developer extension (2341 GitHub stars) that logs network requests from other extensions. It requires technical knowledge to read the output and has no consumer-friendly UX. Normal users cannot use it effectively.

Can you see what extensions do in Chrome DevTools?

Chrome DevTools shows network requests for the active page but does not surface extension background service worker network calls in a unified, per-extension view. DevTools is not designed to audit extension behavior.

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clawsmith.com/signal/ext-no-runtime-visibility-network-calls

⚠ IssueUnderservedbrowser_extensionLive

Users have no way to see what Chrome extensions are actually sending over the network

Browser extensions run with broad permissions (read all site data, intercept requests) but users have zero runtime visibility into what data each extension actually transmits. The only tool to audit this is the show HN 'Little Rat' (555 pts, 101 comments, 2341 GitHub stars), a developer-oriented extension that monitors other extensions' network calls. No consumer-facing product exists that lets a normal user audit their extensions without developer knowledge. A 2023 article 'Let's build a Chrome extension that steals as much data as possible' (849 pts) demonstrated exactly how easily extensions can exfiltrate everything. The Chrome 'Dodging sketchy extensions in 2026' article surfaced February 2026 reflects continued user concern with no product solution.

Product Idea from this Signal

A browser extension that shows you every network call your other Chrome extensions make in real time

3.9k ▲

Chrome users have no visibility into what their installed extensions are actually sending over the network. The only tool that exists is a developer-focused open-source project with no consumer UX, no alerting, and no blocking. This gap leaves everyday users and privacy-conscious professionals completely blind to extension data exfiltration.

browser privacyextension securitynetwork monitoringchromedata exfiltration

Competitive211 leadsView Opportunity →

Score Breakdown

GitHub

2,416

1,505

Social Proof 3 sources

dnakov/little-rat - Small chrome extension to monitor other extensions network calls

gh:dnakov · 8/1/2023

2,416 HN

Let's build a Chrome extension that steals as much data as possible

2/21/2023

849 HN

Show HN: Little Rat - Chrome extension monitors network calls of all extensions

8/14/2023

656

Existing Solutions 2 competitors

Little Rat2341 GitHub stars. Show HN with 555 pts. Developer tool only, no consumer UX.

Developer-oriented Chrome extension that monitors and optionally blocks other extensions network calls.

LayerX Enterprise Extension SecurityEnterprise-only, not for individual users.

Enterprise extension monitoring product with behavioral analysis.

Gap Assessment

UnderservedExisting solutions leave gaps

Little Rat (GitHub 2341 stars) requires developer setup. No consumer product surfaces extension network behavior in a readable way. Enterprise solutions (LayerX) exist for corporate IT but are not priced or designed for individual users. Gap is wide on the consumer side.

Frequently Asked Questions

Virality Score

3,921

across 0 platforms

Details

Signalissue

Ecosystembrowser_extension

Sources3

Platforms0

Updated2h ago

Trend→ stable

Top ideas

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