Firefox Version 30-39 Jun 2026

It was the first version where Mozilla openly admitted that "Web standards compliance must accelerate." For end users, v30 felt like a stability patch—few new front-end features, but crash rates dropped 8% from v29.

Introduced a system to block malicious files from downloads. SSLv3 & RC4 Retirement: To counter vulnerabilities like POODLE, Firefox disabled in Version 34.0 and in Version 39.0. Forget Button (v33.1): firefox version 30-39

Ask any long-time Firefox user about their most-hated feature, and (based on WebRTC) will probably come up. Built in partnership with Telefónica, Hello was a video chat client baked directly into the browser toolbar. It required no account—just share a link. It was the first version where Mozilla openly

To understand the decisions made in versions 30 through 39, one must understand the landscape of 2014. Google Chrome had begun its meteoric rise, eating into Internet Explorer and Firefox’s market share with a browser that felt faster, sleeker, and more minimalist. Chrome’s rapid release schedule forced Mozilla to abandon its traditional "version 1.0, 2.0, 3.0" milestone approach in favor of a rapid, six-week release cycle. Forget Button (v33

Before diving into the changelogs, context is crucial. In mid-2014, Google Chrome had overtaken Internet Explorer as the world’s most popular browser. Firefox was a distant third, bleeding market share. Critics called Firefox "slow" and "bloated." Mozilla responded by doubling down on a rapid release cycle (every six weeks) and two major initiatives:

Following the major "Australis" redesign in version 29, these updates focused on under-the-hood stability and media support.