Overview

• Firefox 140 offers an Unload Tab feature that frees CPU and RAM by unloading inactive tabs without closing them.
• Unloaded tabs fully reload when reopened while retaining their original URLs.
• The vertical tab bar gains enhanced customization, including adjustable width and control over the area reserved for pinned tabs.
• Users can now add custom search engines and enjoy faster page translations that begin with on-screen text.
• The update closes numerous security flaws to reinforce the browser’s defenses.