Firefox Translate Add-on Recommendations: Built-in vs. Page Translation vs. DeepTranslate for Chrome
When reading foreign websites in Firefox, you might wonder, "How can I translate this page into English?", "Can I get page translation like Chrome?", or "Which translation add-on is safe?". For those who read Reddit, international news, tech blogs, GitHub, or PDF documents, the ability to translate directly within the browser makes a significant difference.
First, let's clarify the important points. Firefox has a built-in translation feature that supports translating entire pages and selected text. On the other hand, DeepTranslate is not currently available for Firefox. Please await future support for a Firefox version. If you use Google Chrome, or if you can use Chrome just for reading foreign websites, then trying DeepTranslate's web page translation for Chrome is a practical option.
Conclusion First: Built-in Translation or Add-ons for Firefox, DeepTranslate for Chrome
For those searching for "Firefox translation" or "Firefox add-on translation," it's easier to choose by categorizing as follows:
| Purpose | Recommended Choice | Reason |
|---|---|---|
| Translate an entire page in Firefox | First, try Firefox's built-in translation | No additional add-on needed, easy to verify as an official Mozilla feature |
| Quickly translate only selected text | Compare translation add-ons like Simple Translate | Easy to use right-click or pop-up translation |
| Use multiple translation engines | Compare TWP / ImTranslator, etc. | For those who want to switch between Google, DeepL, and other options |
| Read foreign websites, Reddit, tech blogs with original text | Use DeepTranslate with Chrome | Easy to compare Japanese translation and original text while reading the page |
| Read PDFs and long documents | Consider tools like DeepTranslate for document comprehension | Requires understanding the entire document, not just a translation box |
If you want to stick with Firefox, the focus is on comparing built-in translation and Firefox add-ons. If Chrome is also an option, DeepTranslate can be considered for long document reading and bilingual display.
If you want to read foreign websites in English with Chrome
With DeepTranslate, you can translate a web page while keeping it open, and compare the original text with the translated text.
What Firefox's Built-in Translation Can Do
Mozilla's official Firefox help page on translating web pages explains Firefox's page translation, selected text translation, and translation settings. While older articles might state that "Firefox doesn't have standard translation," as of 2026, it's natural to check the built-in translation first.
Full Page Translation
Firefox's built-in translation can translate web pages in supported languages into other languages. This is useful when you want to quickly grasp the meaning of an entire page, such as international news or product pages.
However, it may not work as expected on all sites or for all languages. If the translation icon doesn't appear, only parts of the page are translated, or technical terms sound unnatural, it's worth considering add-ons or translation tools in other browsers.
Selected Text Translation
When you only want to check a single sentence, not the entire page, selected text translation is convenient. It's lighter to use than full page translation in situations where you find part of an English article difficult to understand, want to check a short social media post, or just look up a technical term.
Privacy Features
Mozilla's Firefox translation feature page explains that translation models are downloaded to the browser and processed locally. For many Firefox users who prioritize privacy during translation, this is a major appeal of Firefox's built-in translation.
However, the strength of local processing is separate from translation quality, supported languages, page structure, and ease of PDF comprehension. If the content you want to read is long and you need to cross-reference the original and translated text, it's more practical to use other tools in conjunction, depending on your purpose.
Checkpoints When Choosing a Firefox Translation Add-on
When choosing a Firefox add-on, check not only translation accuracy but also permissions, update status, usage, and translation method. Add-ons are convenient, but they often have permission to read page content, so you should check what you are allowing.
| Check Item | Points to Verify |
|---|---|
| Permissions | Does it access the content of the page you're viewing? Does it work on all sites? |
| Update Status | Is it still being maintained recently? |
| Translation Method | Selected text, pop-up, entire page, sidebar, etc. |
| Supported Services | Which translation services does it use, such as Google, DeepL, Microsoft? |
| Display Method | Does it keep the original text, or replace the entire page? |
| English Support | Translation to English, English UI, clarity of settings |
| Long Text Support | Is it easy to read Reddit comments, tech blogs, or long articles? |
Firefox users often prioritize privacy and browser freedom, so it's recommended to judge based on official pages, reviews, permissions, and update dates, rather than just installing because it's popular.
Comparison of Recommended Firefox Translation Add-ons
Here, we compare popular translation add-ons for Firefox. DeepTranslate is not currently available as a Firefox add-on, so it is not included in this list as an "immediately available option for Firefox."
| Add-on / Method | Suitable Use Cases | Caveats |
|---|---|---|
| Firefox Built-in Translation | Want to translate pages without additional add-ons | May have limitations in supported languages, translation quality, and display granularity |
| Simple Translate | Quickly translate selected text or short sentences | More suitable for partial translation than full page comprehension |
| TWP / Translate Web Pages | Want to supplement full page translation with an add-on | Use after checking permissions and update status |
| ImTranslator | Want to use multiple services or pop-up translation | Has many features, so settings need to be reviewed |
| DeepL-related Add-ons | Want to check natural phrasing | Check official/unofficial status, permissions, and usage limits |
Simple Translate
Simple Translate Firefox add-on is a good option for those who want to quickly translate selected text. It's suitable for checking parts of foreign articles, or looking up English words and short phrases on the spot.
TWP / Translate Web Pages
For those who want to translate entire pages, TWP / Translate Web Pages add-ons are also an option. This type is easy to consider if you're not satisfied with Firefox's built-in translation or are looking for a page translation experience closer to Chrome.
ImTranslator
ImTranslator for Firefox is for those who want to use multiple features like text translation, pop-up translation, and dictionary lookups. Since it has many features, it's safer to check which translation services it uses and which permissions you are granting before using it.
DeepL-related Add-ons
If you prioritize natural phrasing, DeepL-based tools are also an option. However, there are official and unofficial Firefox add-ons, so check the provider, permissions, reviews, and update status before installing.
Is DeepTranslate Available for Firefox?
In short, DeepTranslate is not currently available for Firefox. Please await future support for a Firefox version.
Therefore, we cannot provide instructions to "install DeepTranslate Firefox add-on now." If you want to stick with Firefox, compare Firefox's built-in translation, translation add-ons on Mozilla Add-ons, or selected text translation tools.
On the other hand, if you use Google Chrome, or if you don't mind doing foreign website and PDF reading tasks in Chrome, you can try DeepTranslate immediately. Especially for the following reading scenarios, an environment where you can compare the original and translated text in the browser is beneficial:
- Reading international news daily
- Following comments on Reddit or foreign forums
- Reading long articles on Hacker News or tech blogs
- Checking releases from AI companies or SaaS companies
- Reading PDFs, academic papers, specifications, or reports

While waiting for the Firefox version, try DeepTranslate on Chrome
If you can use Chrome, you can immediately start web page translation, PDF translation, and long document reading with DeepTranslate.
Why DeepTranslate is Convenient for Reading Foreign Websites in English with Chrome
Chrome also has an official help page for page translation. While the standard translation feature is sufficient in some cases, for those who read foreign websites in depth, a translation environment that allows simultaneous viewing of original and translated text is helpful.
For example, in announcements from AI companies or international news, you need to check not only the headlines but also the body text, annotations, proper nouns, and technical terms within their context. If you only look at the translated text, you might misunderstand the nuances of company names, product names, technical terms, or quoted sections.

DeepTranslate is suitable not for translating short sentences, but for making the "reading process" itself easier.
- Want to read while translating the entire page
- Want to check translated terms while keeping the original text
- Don't want to repeatedly copy and paste long articles
- Want to read comments or table structures without breaking them
- Want to check PDFs and technical documents with the same workflow
Even Firefox users who use Chrome for work or study can practically use DeepTranslate just for reading foreign websites.
Read international news and tech blogs with original text
With DeepTranslate, you can translate long pages and check technical terms and proper nouns in the original text.
How to Differentiate Between Firefox and Chrome Translation Features
Instead of one being definitively better, it's convenient to use Firefox and Chrome for translation based on your purpose.
| Scenario | When Firefox is Suitable | When Chrome + DeepTranslate is Suitable |
|---|---|---|
| Light page translation | Want to translate without additional add-ons | Want to compare original and translated text |
| Privacy-focused | Prioritize local translation | Prioritize content verification and reading efficiency |
| Reddit or forums | If built-in translation or add-ons are sufficient | Want to read while maintaining comment hierarchy |
| Tech blogs | Want a rough overview | Want to check context around terms and code |
| PDFs / Papers | May not be sufficient with Firefox alone | Prioritize document translation and original text comparison |
In foreign communities like Reddit, short replies, slang, sarcasm, and quotes are mixed. Since built-in page translation or SNS-side translation may not always display, having multiple browser translation options is reassuring.

The same applies to tech blogs. Code, function names, product names, and technical terms are sometimes easier to understand if the original text is preserved rather than fully translated.

FAQ
What should I do if Firefox can't translate a page?
First, check if Firefox's built-in translation supports the target page and language. If the translation icon doesn't appear, check the page's language recognition, site structure, Firefox settings, and version. If it's still difficult, consider a translation add-on or translation in another browser.
Which Firefox translation add-on is recommended?
For short texts, Simple Translate; for supplementing page translation, TWP / Translate Web Pages; and for multiple features, ImTranslator are good options. In all cases, check permissions, reviews, and update status on Mozilla Add-ons.
Is there a Firefox version of DeepTranslate?
Currently, DeepTranslate is not available for Firefox. Please await future support for a Firefox version. If you can use Chrome, you can use DeepTranslate's web page translation and PDF translation.
Is Firefox's built-in translation safe?
Mozilla explains that Firefox's translation feature processes translation models locally by downloading them to the browser. This is a significant advantage for Firefox users who prioritize privacy. However, translation quality and scope need to be checked depending on the use case.
Between Firefox and Chrome, which is more convenient just for translation?
If you just want to lightly translate a page into English, Firefox's built-in translation may be sufficient. If you want to read foreign websites, Reddit, tech blogs, or PDFs while comparing them with the original text, using DeepTranslate with Chrome can be more convenient in many situations.
Summary: Choose Wisely for Firefox, Utilize DeepTranslate for Chrome
If you're looking for a Firefox translation add-on, first check if Firefox's built-in translation is sufficient, and then supplement any shortcomings with an add-on. Firefox has privacy advantages, and its built-in translation has become more practical than before.
However, DeepTranslate is not currently available for Firefox. Please await future support for a Firefox version. For those who can use Chrome, or who can use Chrome just for reading foreign websites, try the workflow of reading web pages, Reddit, tech blogs, and PDFs with original text using DeepTranslate.
Start Web Page Translation with Chrome
With DeepTranslate, you can translate foreign websites and PDFs while keeping them open, and compare the original text with the translated text.