Is Responsive Tester - Multi-Screen Simulator safe to install?

What data it declares

The developer declares that it does not collect or use your data.

The developer also certifies that your data is not sold to third parties outside approved uses, not used for purposes unrelated to the extension's core function, and not used to decide creditworthiness or lending.

The listing does not link to a privacy policy.

This is the developer's own declaration in the Chrome Web Store. We cannot check it against what the extension does.

What Chrome asks you to allow

When you add it, Chrome asks you to allow it to:

• Read and change all your data on all websites
• Block content on any page
• Read your browsing history
• Capture content of your screen

Derived from the manifest by Chrome's documented rules; the dialog's exact wording depends on your Chrome version and language. Chrome asks again if an update requests more.

What it can reach

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

Reaches your browsing data or every site

• Clear your browsing data browsingData
• Capture the contents of your screen desktopCapture
• Capture the contents of a tab tabCapture
• See the address and title of every tab you have open tabs

Worth knowing

• Block or redirect requests by rules it declares in advance declarativeNetRequest
• Block or redirect requests on the sites it can access declarativeNetRequestWithHostAccess
• Run its own code on the pages it can access scripting
• See when you navigate between pages webNavigation

Routine for an extension

• Act on the current tab, but only after you click it activeTab
• Add items to the right-click menu contextMenus
• Run work in a hidden page offscreen
• Store data in your browser storage
• Store data in your browser without the usual size limit unlimitedStorage

How usual this is for its category

In Productivity · Developer, 31% of extensions ask for access to every site. This one: Access to every site.

The typical extension there declares 3 browser permissions; this one declares 13 browser permissions.

• Clear your browsing data (browsingData): 1% of extensions in this category ask for it.
• Capture the contents of your screen (desktopCapture): under 1% of extensions in this category ask for it.
• Capture the contents of a tab (tabCapture): 1% of extensions in this category ask for it.
• See the address and title of every tab you have open (tabs): 27% of extensions in this category ask for it.

Counted over the live extensions of the same category after our latest full pass of the store. A share is context, not a verdict: what is normal depends on what the extension is for.

Who uses it and how it is kept up

8 users

• Last updated in the store 1 day ago, on 2026-10-03.
• We have seen 5 new versions in the last 90 days.

What the store shows

• Established publisher The store's badge for publishers with a good record and no history of violations.
• Trader The publisher has declared itself a trader under EU rules.

Has it asked for more over time?

This is the question a permission list on its own cannot answer. An extension that shipped narrow and widened later is a different proposition from one that always asked for the same thing.

1. 2026-10-01Asked for more permissions (14, was 8)

Versions we have seen

1. 2026-10-03Version 2.0.7
2. 2026-10-02Version 2.0.6
3. 2026-10-02Version 2.0.2
4. 2026-10-01Version 2.0.0 · Asked for more permissions (14, was 8)
5. 2026-09-28Version 1.0.6

Who publishes it

thong.nguyenn56, who publishes 2 listings we track. This listing has been in the store since 2026-09-24 and was last updated on 2026-10-03.

Similar extensions that ask for less

Listings close to this one in what they say they do, which declare less reach. Less reach is not a verdict on either: compare what each needs for the job.

1. ScreenLab No site access · 3 permissions 14 users ★ 5.0
2. ViewPortIQ No site access · 4 permissions 8 users ★ 4.5
3. Responsive Tester — Mobile View by BugCapture No site access · 4 permissions 10 users

How to check or remove it in Chrome

1. Type chrome://extensions in the address bar and find the extension in the list.
2. Open its details. The site access setting shows where it can run; set it to run only on click and it reaches a page only after you press its icon.
3. To uninstall it, choose Remove on the same page.

Questions people ask

What can Responsive Tester - Multi-Screen Simulator access?

Every site you visit. This extension can read and change the content of any page you open. It declares 13 browser permissions.

What data does Responsive Tester - Multi-Screen Simulator collect?

The developer declares that it does not collect or use your data. This is the developer's own declaration in the Chrome Web Store. We cannot check it against what the extension does.

Has Responsive Tester - Multi-Screen Simulator asked for more permissions over time?

Its permissions changed once while we watched, on 2026-10-01.

Does Responsive Tester - Multi-Screen Simulator publish a privacy policy?

No, the store listing does not link to a privacy policy.