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Click or double-click the Firefox app icon, which resembles an orange fox wrapped around a dark-blue globe icon. This add-on will allow you to translate entire Firefox webpages via Google Translate without having to use the Google Translate website. It's a blue button in the middle of the page. Doing so allows the add-on to install to Firefox. This will confirm that the add-on successfully installed. Find and open the webpage that you want to translate. It's a speech bubble icon in the upper-right corner of Firefox. Doing so will prompt a drop-down menu to appear. If you don't see the Translator icon, first click in the upper-right side of the window. You should see the Translator icon appear at the top of the drop-down menu. This option is in the drop-down menu. Your translated webpage will open in a new tab. You can alter the language that Translator uses to translate pages by doing the following: Right-click the Translator icon. Click Options (Change language). Click Web Translation. Click the "Select target language" drop-down box. Select a language in the drop-down menu. Click Save options at the top of the page.
Open Firefox. Open the Translator add-on installation page. Click Add to Firefox. Click Add when prompted. Click OK when prompted. Go to a webpage. Right-click the Translator icon. Click Translate this page to [Language]. Change the translation language if necessary.