Is Cumulus — S3, R2 & WebDAV File Manager safe to install?

What data it declares

The developer declares that it collects these kinds of data:

• Authentication information such as passwords, credentials or PIN codes

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 all your data on all websites
• 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

Every site you visit. This extension can read and change the content of any page you open. What access to every site means

Worth knowing

• Manage your downloads downloads

Routine for an extension

• 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 · Tools, 20% 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 3 browser permissions.

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

39 users

• Last updated in the store 111 days ago, on 2026-07-14.
• 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

Hanif Pramono. This listing has been in the store since 2026-07-14 and was last updated on 2026-07-14.

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. CloudEdit No site access · 1 permission 60 users ★ 5.0
2. My S3 Browser Access to specific sites only · 1 permission, 1 site pattern 5k users ★ 3.2
3. S3 Browser, WebDAV Client & Cloud Storage Manager — Stream Vessel Access to specific sites only · 3 permissions, 1 site pattern 197 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 Cumulus — S3, R2 & WebDAV File Manager access?

Every site you visit. This extension can read and change the content of any page you open. It declares 3 browser permissions.

What data does Cumulus — S3, R2 & WebDAV File Manager collect?

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

Has Cumulus — S3, R2 & WebDAV File Manager asked for more permissions over time?

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

Does Cumulus — S3, R2 & WebDAV File Manager publish a privacy policy?

Yes, the store listing links to a privacy policy.