Is MultiViewer Companion safe?

Clean risk

Connects your browser with MultiViewer for account sign-in and opening videos.

This extension integrates your browser with MultiViewer so you can sign into your account through the browser. It also lets you directly open videos from your browser, with access limited to MultiViewer, Formula 1, F1 TV, and localhost pages listed in its permissions.

MultiViewerFirefox Add-ons
0Risk
Who publishes it

MultiViewer - no other listings under this identity

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

Publisher
MultiViewer

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

Publishers can request a review.

Where it sends data

Destinations our analysis observed MultiViewer Companion 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.

  • f1tv.formula1.com

    MultiViewer Companion sends data to f1tv.formula1.com. One other extension we have analyzed sends data here.

  • formula1.com

    MultiViewer Companion sends data to formula1.com. No other extension we have analyzed sends data here.

  • multiviewer.app

    MultiViewer Companion sends data to multiviewer.app. No other extension we have analyzed sends data here.

  • multiviewer.dev

    MultiViewer Companion sends data to multiviewer.dev. No other extension we have analyzed sends data here.

  • multiviewer.test

    MultiViewer Companion sends data to multiviewer.test. No other extension we have analyzed sends data here.

  • localhost

    MultiViewer Companion sends data to localhost. Named as a recipient by 19 other extensions we have analyzed.

Updated 15 October 2026amo-2812521