Who should use Localizer?

Localizer is a consumer product built for firefox users watching multilingual video and audio content.

Yes — Localizer is free to use.

What platforms does Localizer run on?

Localizer runs on the web, embeddable surfaces, and Android.

Is Localizer still maintained?

Unverified. Localizer has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

What projects are similar to Localizer?

Similar projects tracked by PulseGate include Live Subtitle & Translator, Localizer, and Live Translator.

Localizer is developed by Lingo Live.

When did Localizer launch?

Localizer first shipped in 2026.

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Localizer

Name: Localizer
Author: Lingo Live

mozilla.orgVoice & speech translation

Localizer is a Firefox extension that generates live captions from audio playing in a browser tab using on-device transcription. It can display original-language captions, translate them into English locally, and provide a rewindable caption timeline for videos, lectures, webinars, and other audio content.

FreeWebEmbeddableAndroid

Visit mozilla.org

Overview

6 features

Localizer is a Voice & speech translation project. It focuses on understanding audio and video content without built-in subtitles or cloud transcription. Localizer is a consumer product aimed at firefox users watching multilingual video and audio content. It is available for free. It ships for the web, embeddable surfaces, and Android.

Behind Localizer is Lingo Live, and it first shipped in 2026. Key capabilities include live captions, on-device transcription, and english translation. The interface is available in 32 languages, including Czech, German, and Greek.

Summary written by a language model from the project’s public pages.

Live captions
On-device transcription
English translation
Rewindable captions
Any-site audio
Real-time captions

Built with & integrations

Runs on

BrowserEmbeddableAndroid

Trust & compliance

Verified signals

HTTPSPrivacy Policy Terms of ServiceFree tierMulti-languageStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed13 Sep · 23:52 UTC
Localizer — live tab captions verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Localizer

What is Localizer?: Localizer focuses on understanding audio and video content without built-in subtitles or cloud transcription. It is catalogued under Voice & speech translation on PulseGate.
Who should use Localizer?: Localizer is a consumer product built for firefox users watching multilingual video and audio content.
Is Localizer free?: Yes — Localizer is free to use.
What platforms does Localizer run on?: Localizer runs on the web, embeddable surfaces, and Android.
Is Localizer still maintained?: Unverified. Localizer has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
What projects are similar to Localizer?: Similar projects tracked by PulseGate include Live Subtitle & Translator, Localizer, and Live Translator.Live Subtitle & Translator Localizer Live Translator
Who makes Localizer?: Localizer is developed by Lingo Live.
When did Localizer launch?: Localizer first shipped in 2026.

At a glance

Pricing: Free
Platforms: Web
First seen: 13 Sep 2026
Built for: Firefox users watching multilingual video and audio content
Model: B2C
Solves: Understanding audio and video content without built-in subtitles or cloud transcription.

Registered as

Firefox Add-ons: localizer-live-tab-captions

Developer

Lingo Live

Index record

Indexed: 13 Sep 2026
Lifecycle: Alive
First seen: Sep 2026
Last seen: 13 Sep 2026

Identity audit (13)

Slug: localizer-live-tab-captions-mozilla-org
Lifecycle state recorded: 13 Sep 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 13 Sep 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Name from: Derived from the project's own page and URL.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 13 Sep 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/localizer-live-tab-captions

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