TranslateLocally for Firefox

TranslateLocally for Firefox is a webextension that enables local and private in-page translations for web browsers. It is a stand-alone extension, but can integrate with TranslateLocally for custom models and even better performance.

TranslateLocally brings state-of-the-art machine translation to your own, private device. Unlike other translators, it does not rely on the cloud. Your text never leaves your device. And it also works just as fast when you have a bad or no connection to the internet.

Features:

  • Translate all text on a website (including highly dynamic sites like Youtube, Twitter)
  • Translate selected text only (Select text and right-click "Translate selection")
  • Help you translate text in forms (Right-click a form field and click "Type to translate…")
Supported languages:
  • Bulgarian
  • Czech
  • English
  • Estonian
  • French
  • Spanish
  • German
  • Icelandic (only from)
  • Norwegian (only from)
  • Polish
Support for more languages will come once the HPLT project gets underway.

This extension for Firefox integrates the features of TranslateLocally in your browser. It works without the TranslateLocally desktop application but if you have it installed TranslateLocally for Firefox will work even faster and share the translation language models with the desktop app.

TranslateLocally is one of the products to come out of the Bergamot project. The Bergamot Project Consortium is coordinated by the University of Edinburgh with partners Charles University in Prague, the University of Sheffield, University of Tartu, and Mozilla. This project has received funding from the 🇪🇺 European Union’s Horizon 2020 research and innovation programme under grant agreement No 825303.

Manifest V2 Add-on
By:
Jelmer van der Linde
Daily users:
465 -4
Rating:
4.06
(17)
Version:
0.8.2 Last updated: 2022-11-24
Version code:
5490485
Creation date:
2022-10-03
Risk:
High risk impact Low risk likelihood
Permissions:
  • <all_urls>
  • contextMenus
  • tabs
  • storage
  • nativeMessaging
Size:
2.32MB
URLs:
Website
Full description:
See detailed description
Source:
Firefox Browser Add-ons
Updated:
a day ago

User reviews

Pros
  • Works well for local translations without the need for cloud services.
  • Good for privacy, as it does not rely on online translations.
  • Simple user interface and ease of use.
  • Ability to translate the same page without pop-ups.
Cons
  • Missing support for certain languages (e.g., Russian removed).
  • Some features, like "Translate selection," do not work as expected.
  • Extension compatibility issues with Firefox Beta and Nightly for Android.
  • Need for more translation engine options and a settings section.
Recent reviews
I have done all the instructions to get a translation to english on a website that is in German - trying to answer questions and it's not translating to English so now I'm forced to pull up a new window and having to copy paste the question in german to see what is being asked.. problem continues because the answers to choose from are not able to be copied.. this is not working.. I've added extention to translate as well as selected from the menu to translate .. nothing is getting fixed.. why is this happening ?
by Fi*****, 2025-06-09

The project from which this extension got its foundation is a great one and the extension works well too! Waiting for more European and Asian too.
by Ya*****, 2024-11-17

бесполезное после того как убрали русский язык. хотя болгарский имеется.
by Ва*****, 2024-10-13
View all user reviews ›

Extension safety

Risk impact
Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

TranslateLocally for Firefox requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details
  • Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
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  • High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****
  • Medium *********** ************* ******* ********** *** ****** ************* ******* *** **** ** ******* **********
Risk likelihood
Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Browser Add-ons, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

TranslateLocally for Firefox has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details
  • High This extension has low user count. Unpopular extensions may not be stable or safe.
  • Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
  • Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
  • Good **** ********* *** **** **** *******
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