Is Post Filter Pro safe?

Clean risk

Post Filter Pro sends login credentials with a browser and screen-derived device ID to app.kyubi.io.

When a user signs in, Post Filter Pro sends the entered email address and password to app.kyubi.io. The same request includes a device ID built from browser plugin and MIME type counts, user-agent digits, and screen properties.

Tier5 Technologiesv2.1.44Chrome Web Store
0Risk
Who publishes it

Tier5 Technologies - 5 other listings from the same operator, 1 of them carrying a finding

What this publisher told the store about itself, and the other listings that told it the same thing.

Publisher
Tier5 Technologies

Same store account

5 other listings published from this account, 9k+ users between them. 1 of them carries a finding.

AI-generated. Findings may contain errors. Those marked Verified have been manually reviewed.

Publishers can request a review.

What it can do

Permissions this extension asks for, as declared in version 2.1.44. Asking for a permission is not a finding on its own - it is what the extension can do if it chooses to.

  • Read and change your data on facebook.com

    https://facebook.com/*

  • Read and change your data on www.facebook.com

    https://www.facebook.com/*

  • Store data in your browser

    storage

  • See every page you navigate to, as you navigate to it

    webNavigation

  • Run its own code inside the pages you visit

    scripting

Where it sends data

Destinations our analysis observed Post Filter Pro contacting. Sending data somewhere is not a finding on its own - an extension that syncs your settings has to talk to its own server - but it is where your data can go, and who else it goes to.

  • app.kyubi.io

    Post Filter Pro sends data to app.kyubi.io. 2 other extensions we have analysed send data here.

Updated 30 September 2026phjlhohkilpanhamgpdijbpojmgnpgff