Open-source web browsers like Firefox make it possible for libraries to offer free research tools built into the browser itself. Two such tools are LibX, a search and discovery aid, and Zotero, a citation and reference manager. LibX allows libraries to customize its features to offer users easy search access to specific collections, as well as automatically inserting library links into other web pages. Zotero allows researchers to easily save citations from library catalogs, databases, and other websites, to create bibliographies in many citation styles, and to share references with its group features.