Is Netflix Bilingual Subtitles safe?

Low risk

Netflix Bilingual Subtitles exposes its stored user token to scripts running on Netflix pages.

When its Netflix content script runs, it injects the subtitle script and answers a page message by reading browser storage values including userId and userToken. It posts those values back to the page with targetOrigin '*', so other scripts on the same Netflix page can listen for the stored user token.

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

Netflixsubsv12.17Firefox Add-ons
15Risk
Who publishes it

Netflixsubs - 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
Netflixsubs

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.

netflixsubs.app
Also called by 4 other listings, including Youtube Bilingual Subtitles, Netflix Bilingual Subtitles, RikoSub
sora.netflixsubs.app
Also called by 4 other listings, including Youtube Bilingual Subtitles, Netflix Bilingual Subtitles, RikoSub

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 12.17. 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

Where it sends data

Destinations our analysis observed Netflix Bilingual Subtitles 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.

  • netflix.com page scripts

    Netflix Bilingual Subtitles sends data to netflix.com page scripts. Named as a recipient in this extension's own analysis.

Updated 30 September 2026amo-2724815