Upon installing the Firefox browser, some users encounter language display issues, switching to English or even French, causing usage difficulties. In this article, Mytour guides you on a simple method to change the language for Firefox. Feel free to check it out.

To change the language for Firefox, the most reliable and 100% successful method is to uninstall the current Firefox and install the Vietnamese version.
First, let's uninstall the existing Firefox browser from your computer. Open the Control Panel, then select Uninstall a Program.

Next, locate Firefox in the list of software, right-click, and choose Uninstall to remove it.

After successfully uninstalling, visit the address below to download the Vietnamese version of Firefox.
Download link: https://www.mozilla.org/vi/firefox/

If you wish to download Firefox in a different language, scroll down to the bottom to select your preferred language:

After downloading, double-click on the file to initiate the installation process. The installation will proceed automatically, so please wait for it to complete.

Now, the Firefox browser has been switched to the Vietnamese language:

In just a few simple steps, we have successfully changed the language of the Firefox browser to Vietnamese. Thank you for following along, and we wish you all the best!