EPUBReader is one of the most popular extensions for Firefox, introducing support for electronic publications in ePub format in this browser. This plugin allows you to browse the content of electronic ePub publications directly in the browser window without the need to use any external software. EPUBReader downloads such a document, processes it, and then displays its contents.

With the help of this extension we will also open e-books already saved on your hard disk. Just open the file in your Firefox browser. EPUBReader is well placed to handle more extensive publications containing graphics.