Is AMASTREAM Member tools 3 safe to install?

What data it declares

The developer declares that it collects these kinds of data:

• Personally identifiable information such as name, address, email address or age
• Authentication information such as passwords, credentials or PIN codes
• User activity such as clicks, scrolling, keystrokes or network monitoring
• Website content such as text, images or links on the pages you open

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 links 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 your data on a number of websites
• Read your browsing history
• Manage your downloads

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

Specific sites only: 35 match patterns.

• https://*.amazon.co.jp/* amazon.co.jp and all its subdomains
• https://*.amazon.com/* amazon.com and all its subdomains
• https://*.app5.jp/* app5.jp and all its subdomains
• http://*.app5.jp/* app5.jp and all its subdomains
• https://*.yodobashi.com/* yodobashi.com and all its subdomains
• https://*.rakuten.co.jp/* rakuten.co.jp and all its subdomains
• https://*.yahoo.com/* yahoo.com and all its subdomains
• https://*.mercari.com/* mercari.com and all its subdomains
• https://*.fril.jp/* fril.jp and all its subdomains
• https://*.yamada-denkiweb.com/* yamada-denkiweb.com and all its subdomains
• https://*.joshinweb.jp/* joshinweb.jp and all its subdomains
• https://*.ksdenki.com/* ksdenki.com and all its subdomains
• and 23 more

Reaches your browsing data or every site

• See the address and title of every tab you have open tabs

Worth knowing

• Manage your downloads downloads

Routine for an extension

• Add items to the right-click menu contextMenus
• Store data in your browser storage
• Read your display setup system.display

Pages it runs its code on

It runs its own code on specific pages only: 11 site patterns.

• https://*.amazon.co.jp/* amazon.co.jp and all its subdomains
• https://*.amazon.com/* amazon.com and all its subdomains
• https://search.yahoo.co.jp/* only search.yahoo.co.jp

A content script is code the extension injects into pages matching these patterns. On those pages it can read and change what you see, whether or not a host permission is listed above.

How usual this is for its category

In Productivity · Workflow, 19% of extensions ask for access to every site. This one: Access to specific sites only.

The typical extension there declares 3 browser permissions; this one declares 5 browser permissions.

• See the address and title of every tab you have open (tabs): 33% 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

475 users

• Last updated in the store 86 days ago, on 2026-08-11.
• No new version in the last 90 days.

What the store shows

The store shows none of its badges on this listing. Most listings carry none.

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.

The permissions this extension requests have not changed since we started watching it.

Who publishes it

dev.app5jp, who publishes 3 listings we track. This listing has been in the store since 2018-11-15 and was last updated on 2026-08-11.

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. Spy Rivals X No site access · 1 permission 1k users ★ 5.0
2. retailscout No site access · 5 permissions 52 users
3. Snap ASIN: ASIN Finder & Grabber – Export ASIN List to CSV Access to specific sites only · 1 permission, 8 site patterns 5 users ★ 5.0

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 AMASTREAM Member tools 3 access?

Specific sites only: 35 match patterns. It declares 5 browser permissions.

What data does AMASTREAM Member tools 3 collect?

The developer declares that it collects these kinds of data: Personally identifiable information, Authentication information, User activity, Website content. This is the developer's own declaration in the Chrome Web Store. We cannot check it against what the extension does.

Has AMASTREAM Member tools 3 asked for more permissions over time?

The permissions this extension requests have not changed since we started watching it.

Does AMASTREAM Member tools 3 publish a privacy policy?

Yes, the store listing links to a privacy policy.