Is Dual Subtitles & AI Translation - InterSub safe?

Clean risk

Dual Subtitles & AI Translation - InterSub sends selected subtitle or page text and video context to app.intersub.cc.

When translation is requested, the extension packages the selected text with page or video context, language settings, timezone, plugin/user data from the InterSub SDK element, and consent fields. Its background worker posts that payload to https://app.intersub.cc/api/public/translate.

InterSubv4.48.0Firefox Add-ons
2Risk
Who publishes it

InterSub - no other listings under this identity, 6 shared hostnames

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

Publisher
InterSub

Shared hosts - 6 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.

intersub.cc
Also called by 2 other listings, including Dual Subtitles & AI Translation - InterSub
plugin.intersub.cc
Also called by 2 other listings, including Dual Subtitles & AI Translation - InterSub
biliintl.com
Also called by 3 other listings, including Dual Subtitles & AI Translation - InterSub, AI Language Translator
topcpmcreativeformat.com
Also called by 3 other listings, including AI Language Translator
topcreativeformat.com
Also called by 3 other listings, including Dual Subtitles & AI Translation - InterSub, AI Language Translator
learngerman.dw.com
Also called by 4 other listings, including AI Language Translator

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 4.48.0. 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 every site you visit

    <all_urls>

  • Store data in your browser

    storage

  • Sign you in with your Google account

    identity

  • Store an unlimited amount of data in your browser

    unlimitedStorage

  • Watch every request your browser makes

    webRequest

Where it sends data

Destinations our analysis observed Dual Subtitles & AI Translation - InterSub 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.intersub.cc

    Dual Subtitles & AI Translation - InterSub sends data to app.intersub.cc. No other extension we have analysed sends data here.

Updated 30 September 2026amo-2826122