Is WebNowPlaying safe?

Low risk

WebNowPlaying lets any web page send media-control commands through its page message bridge.

WebNowPlaying runs a content script on every web page and frame so it can connect browser media players to external adapters. Its page message bridge accepts WebNowPlaying info messages from the page and forwards command strings to the extension's background script, which can route them to the active tracked player tab for actions like skipping tracks, changing volume, or seeking playback.

Part of this rating comes from analysis signals we haven't published as detailed findings yet.

keifufuv3.1.0Firefox Add-ons
15Risk
Who publishes it

keifufu - no other listings under this identity, 2 shared hostnames

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

Publisher
keifufu

Shared hosts - 2 hostnames

Hostnames hardcoded in this extension that few other listings call. That can mean one operator behind both, and it can equally mean a small shared vendor, so it is context rather than a conclusion. Hosts that many listings call are left out: they are services, not connections.

wnp.keifufu.dev
Also called by 1 other listing: WebNowPlaying
e-cdns-images.dzcdn.net
Also called by 5 other listings, including WebNowPlaying, Web Scrobbler

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 3.1.0. Asking for a permission is not a finding on its own - it is what the extension can do if it chooses to.

  • Store data in your browser

    storage

Updated 30 September 2026amo-824608