Light (once Light Firefox) is a "lean" edition of the popular Firefox browser, which was created, among others, with older computers in mind. Its creators will try to ensure that the program has the same functionality while reducing the system resources used and shortening the startup time. The browser, like its protoplasta, offers all the necessary options and tools to enable the user to browse the Internet comfortably and efficiently.

These include the card mechanism, integrated file download manager, bookmarks, history and private web browsing mode. However, Light Firefox does not include tools supporting the work of web developers, such as a style editor, profile, debugger, web console, etc., which by default are offered in applications from Mozilla. Creators have implemented support for Firefox plug-ins and themes.

Light is currently one of the fastest and most efficient Firefox compilations available on the market. By removing the tools unnecessary for a typical user from the browser, it starts up immediately and uses only a small amount of system resources during its operation. It is therefore a very good solution for fans of Mozilla software who would like to use their favorite browser on older computers.