ScTranslator is a versatile translation extension designed for Firefox that allows users to translate text from multiple sources simultaneously. With features like customizable themes, keyboard shortcuts, and a separate translation window, it enhances the translation experience by providing options to view original and translated text side by side. Users can also access their translation history for easy reference and manage various translation sources, including the ability to add custom sources.

This extension supports webpage translations and facilitates inline web translations, allowing for seamless integration into browsing activities. Additionally, it includes a PDF viewer for translating PDF documents, making it a valuable tool for users who frequently work with multiple languages. With a user-friendly options page, ScTranslator encourages customization to suit individual preferences, ensuring a tailored translation experience.