MODS: Wasn't sure where this goes please move if necessary
Firefox 31 adds blocking malware downloads and beefs up security.
Firefox Security Advisories page lists 11 advisories that plug a total of 4 critical, 5 high, 4 moderate and 2 low-risk security flaws.
Because critical bugs are remotely exploitable, please upgrade to the latest version ASAP by opening Help menu (press Alt key once if Menu bar is not visible) and clicking About Firefox.
Manual download is also available at: http://www.mozilla.com/en-US/firefox/all.html.
Mozilla Firefox 31 also introduces blocking malware from downloaded files, sets mozilla::pkix as default certificate verifier and adds search field to new tab page. First two should make using the browser a bit safer.
See Firefox Notes page for more changes and details