Firefox expired certificate fix. Firefox is built to put you back in control. Then new modifications might become necessary. Mar 22, 2011 · I want to install the latest Firefox on my Ubuntu (64bit) box. Test your sites against soon-to-be-released Firefox browser features with powerful, flexible DevTools that are on by default. Get a sneak peek at the latest Firefox browser features before they’re released. I personally prefer Firefox over Chrome and Edge for a few reasons. Download the browser that puts your privacy first — get Firefox for Windows, macOS, or Linux on desktop. Firefox is created by a global non-profit dedicated to putting individuals in control online. So I don't need to mess with the settings and deal with any broken modification after an update. Firefox is a free web browser backed by Mozilla, a non-profit dedicated to internet health and privacy.