Here's the index of the release notes. The release dates and notable changes are on the individual release notes pages. * http://www.mozilla.org/en-US/firefox/releases/

I am not sure there is any such listing. There are however lists of the release dates and there are release notes for each release. Possibly the simplest method of getting the sort of colated brief listing you require is to look at Wikipedia * http://en.wikipedia.org/wiki/Firefox_release_history * https://wiki.mozilla.org/RapidRelease/Calendar *http://www.mozilla.org/en-US/firefox/28.0/releasenotes/ * http://www.mozilla.org/en-US/firefox/all/ * Note major changes in Firefox 29 https://blog.mozilla.org/futurereleases/2014/02/07/test-the-new-firefox-sync-and-customize-the-new-ui-in-firefox-aurora/

This article has a brief description of new features for each version that was released. <br /> http://en.wikipedia.org/wiki/History_of_Mozilla_Firefox

I don't know if this is what you want; '''''[http://ftp.mozilla.org/pub/mozilla.org/firefox/releases/ Old Versions Of Firefox]'''''