Panescope — Responsive Design Tester & Multi-Device QA

Name: Panescope — Responsive Design Tester & Multi-Device QA
Author: Panescope

Chrome extension by Panescope · Productivity · Tools

Trader

A Chrome extension in Productivity · Tools with 7 users, barely installed.

Every site you visit. This extension can read and change the content of any page you open.

What the developer says, and 5 screenshots

Loading from the Chrome Web Store. Open the listing if it does not appear.

Users: 7
Rating: not rated yet
Users, last 28 days: +7
Version: 1.0
Updated in the store: 2026-10-15
Published: 2026-10-15
Manifest: V3
Browser access: 10 permissions, 1 site pattern

How it has moved

Last 30 daysLast 90 days

Users

+7 since 16.10

0-9 · 10 readings

2026-10-160appeared in the store
2026-10-171
2026-10-182
2026-10-233
2026-10-257
2026-10-298
2026-11-019
2026-11-078
2026-11-117
2026-11-127

Users

+7 since 16.10

0-9 · 10 readings

2026-10-160appeared in the store
2026-10-171
2026-10-182
2026-10-233
2026-10-257
2026-10-298
2026-11-019
2026-11-078
2026-11-117
2026-11-127

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing up to 2 times a day and record a point only when something moves. History beyond ninety days is in the app.

What it can reach

Every site you visit. This extension can read and change the content of any page you open.

Read and change cookies on the sites it can access cookies
Attach to pages the way developer tools do debugger
See the address and title of every tab you have open tabs

Show the remaining 7

Block or redirect requests on the sites it can access declarativeNetRequestWithHostAccess
Manage your downloads downloads
Run its own code on the pages it can access scripting
Act on the current tab, but only after you click it activeTab
Schedule work to run later alarms
Store data in your browser storage
Store data in your browser without the usual size limit unlimitedStorage

The full permission history for this extension

What changed recently

2026-10-16Appeared in the store

The publisher

Panescope.

Like this one

Listings the catalog judges closest in what they say they do.

Responsive Tester - Multi-Screen Simulator Describes nearly the same job, smaller audience 430 users ★ 4.8
Mobile Simulator & Responsive Tester Tools Describes nearly the same job, smaller audience 179 users ★ 5.0
Mobile Lab: Responsive Testing & Screenshots Describes nearly the same job, smaller audience 13 users
ViewPortIQ Describes nearly the same job, smaller audience 77 users ★ 4.5
Responsive Simulator - Multi Device Viewport Tester Describes nearly the same job, smaller audience 18 users

The top 5 only. The full comparison, with why each one is close, is on the alternatives page; ranking a whole neighbourhood by your own criteria is in the app.

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The badge shows the audience and rating from our last pass over the store and links back to this page.

Markdown

[![Users and rating on Ext Ops Panel](https://extops.dev/extensions/gefenchbchgmfjokhfcfgdkmmejfnico/badge.svg)](https://extops.dev/extensions/gefenchbchgmfjokhfcfgdkmmejfnico)

HTML

<a href="https://extops.dev/extensions/gefenchbchgmfjokhfcfgdkmmejfnico"><img src="https://extops.dev/extensions/gefenchbchgmfjokhfcfgdkmmejfnico/badge.svg" alt="Users and rating on Ext Ops Panel" height="20"></a>

Figures come from our own regular passes over the public Chrome Web Store listing, last read on 2026-11-12. The store last changed these figures on 2026-11-11. We publish no contact details for extension developers.