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Firefox Translations is an add-on that helps translate websites in Firefox without using the cloud. Additionally, Firefox version 118 introduces a built-in translation feature, allowing you to perform translations locally within your browser, prioritizing your privacy and security. This feature enables you to effortlessly surf the web in your preferred language. For in-depth guidance on utilizing this feature, explore our Firefox built-in fullpage translation guide.
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I think it is translated locally.
Oh that is pretty cool