Experience the AI ​​translation feature on Firefox.

Starting with Firefox 148 and later, Firefox integrates an AI-powered translation feature. Browser users can access any website and use this AI translation tool to translate entire pages or short sentences and paragraphs of text, from one language to another.

Firefox prioritizes user privacy, so you can customize the AI ​​translation settings. This allows you to choose when to use the AI ​​translation tool in Firefox. Below is a guide on how to use the AI ​​translation tool in Firefox.

Instructions on using the AI ​​translation tool on Firefox.

Step 1:

First, tap the three-line icon, then tap Settings in the list that appears.

On the new interface, click on the Artificial Intelligence (AI) Control section .

Look to the side and turn off the "Block AI enhancements" setting to enable all AI features in your browser.

If you only want to enable AI translation and not any other AI features , scroll down to the AI ​​section on your device and select Available from the dropdown menu under Translation .

Step 2:

In your browser , access about:translations to switch to the AI ​​translation page in Firefox.

Next, select the output language in this interface.

Step 3:

Next, paste the text you want to translate and wait a moment for the translation to appear . Then, copy the translated text to use.

Instructions for translating website content on Firefox

Step 1:

Users access any website, then select the content they want to translate in Firefox. Next, right-click and choose "Translate the selected content to English," which is currently set to the browser's default.

Step 2:

You will now see the content translation interface in Firefox as shown below. To change the target translation language , select your desired language under "Sang" . Currently, Firefox does not support translating websites into Vietnamese.

For example, select "Translate to French" and you will see the translation result as shown in the image. Additionally, below you will see the "Translate entire page" option .

Step 3:

The website in Firefox is instantly translated into your chosen language.

To revert to the original language , look at the address bar and click the translate icon . Then, click " Show original" to return to the website's original language.

Step 4:

Additionally, clicking the gear icon and selecting Translation Settings will give you access to customize the translation feature in Firefox.

You will now see a list of languages ​​supported for website translation in Firefox. You can click Download to download the translation language offline.

Instructions on how to look up words in Firefox using Simple Translate

Step 1:

Users can click the link below to install the Simple Translate extension on Firefox.

1. Download the Simple Translate Firefox extension.

After the installation is complete, you will be redirected to a new web interface displaying information about the version of the extension you are using.

Step 2:

Now, open the website you want to translate, highlight the word or text you want to translate, and then click the extension icon in the address bar.

You will then see the content translated into another language.

If you want to change the target language, click on " Translate this page" and then select the language you want to translate to.

Additionally, the utility supports translating entire websites via Google Translate, translating links, and translating the currently selected tab. To translate an entire website, simply right-click anywhere on the page and select "Translate this page ."

Next, we will be taken to the Google Translate website to translate the entire content on the page.

The method for translating a link is similar: right-click on the link and select "Translate selected link" . You will then be redirected to the Google Translate page to use the translation.

Step 3:

To make the Simple Translate extension work more effectively, we should change some settings. Click on the extension icon in your browser, then click on the gear icon .

Step 4:

Switch to the extension's settings page. The interface is divided into 5 main sections with different settings. In the General section , users can select 2 target languages ​​under Target language. Therefore, when translating, the tool prioritizes that default target language, so select Vietnamese under default target.

If you want to add definitions when selecting a single word for translation, activate "Show multiple translation candidates when a single word is translated."

The definition of a word will include the part that says "what type of word is it?" as shown in the image below.

Step 5:

Scroll down to the Web page section to edit the different translation styles.

Display translation button : This button displays a translation button to open the content translation frame. The translation icon will look like the image below, and you just need to click it to see the translation. You can adjust the size and position of the translation button in the Style section below.

Display translation panel : This displays the translation box without requiring you to click the translation icon as shown above. Users simply highlight the word they want to translate, and the translation result box will appear immediately.

Don't display button or panel : Neither the translation icon nor the translation box will be displayed. Therefore, users will only be able to use the translation box via the extension icon in the browser's address bar.

Do not display the button if translation is not required : The utility detects the language and, if it matches the target language, the translation icon will not be displayed when the word is highlighted.

Automatically switch to the second language : This utility detects the language and, if it matches the default target language, automatically switches to the second target language. This depends on the language settings you configured in the first section, General.

Step 6:

In the Style section , you can customize the display of the button and the translation panel. The Translation Button allows you to adjust the translation icon, and the Translation Panel allows you to adjust the translation panel. For the translation panel, you can choose the width and height, the font size, and the background color.

If you change the background color, choose a color that is clear and pleasing to the eye, avoiding colors that are too dark, so that it complements the colors of the content after translation.

The remaining settings can be left as they are.

Step 7:

If you want to revert to the previous settings, click the Reset button in the Reset settings section .

Simple Translate is a very useful extension that allows users to instantly translate words or paragraphs on the current webpage in Firefox. It offers many settings options for translating web content, suitable for individual needs.

Good luck with your project!

Micah Soto

Update 22 June 2026