January 06, 2014 at 04:30PM from Lifehacker
Windows: Firefox is still a fantastic web browser, but it has gained a bit of bloat over the years. Light aims to alleviate this by stripping many components from the browser for a light (get it?) weight application.
The custom Firefox build removes many components that the average user doesn’t need (like developer tools), but does also cut some key features like spellcheck or printing support. If you need a version that runs as fast as possible without slowing down, Light is perfect. Though it might not suit the power user on their main machine.