It’s a major new revision for Firefox, so there are lots of cool new features and enhancements to discuss, so Mozilla actually announced the release on their main blog. Typical of Mozilla announcements, the version is never mentioned.

At least the announcement lists the changes: “improved look and feel for Linux users, a minor security improvement and additional updates for all Firefox users.” Not much there. Turning to the release notes, it looks like the minor security improvement is related to Javascript. Other changes include ten security fixes, and fixes for a few other bugs.

Since several security vulnerabilities are addressed in 46.0, anyone using Firefox should install the new version as soon as possible.