Is Open Subtitles safe?

Clean risk

Open Subtitles sends the active page origin to gqlos.plus-sub.com after subtitle file loading or selection.

When you load a local subtitle file or select a subtitle from search, the extension runs a tracking mutation that includes the current page's origin. That data is sent to gqlos.plus-sub.com along with the subtitle source and language.

stefan.breitensteinv6.3.8Firefox Add-ons
0Risk
Who publishes it

stefan.breitenstein - 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
stefan.breitenstein

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.

gqlos.plus-sub.com
Also called by 2 other listings, including +sub
opensubtitles.com
Also called by 5 other listings, including Subtitles for Language Learning (Prime Video)

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 6.3.8. 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 plus-sub.com

    https://*.plus-sub.com/*

  • Read and change your data on gqlos.plus-sub.com

    https://gqlos.plus-sub.com/*

  • Read and change your data on opensubtitles.org

    https://*.opensubtitles.org/**/*

  • Read and change your data on opensubtitles.com

    https://*.opensubtitles.com/**/*

  • Act on the current tab, but only after you click the extension

    activeTab

  • Store data in your browser

    storage

  • Watch every request your browser makes

    webRequest

Where it sends data

Destinations our analysis observed Open 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.

  • gqlos.plus-sub.com

    Open Subtitles sends data to gqlos.plus-sub.com. No other extension we have analysed sends data here.

Updated 30 September 2026amo-2752110