Diigo is a browser extension for Mozilla Firefox that enables users to make annotations, highlight text, and save images directly on webpages. This tool offers the convenience of saving notes and selections for future reference, eliminating the need for separate note-taking applications. With Diigo, users can effortlessly mark their place in lengthy texts, remember their last action on a page, and jot down tasks for later. This extension provides a solid foundation with endless possibilities, making it an indispensable tool for enhancing browsing experiences.

Diigo, developed by Diigo Inc., is a free browser extension available for Windows users in the Browsers category, specifically under Add-ons & Tools. Its functionality of annotating web content and saving selections makes it a valuable asset for users looking to streamline their online research and note-taking processes.