Mozilla patched 11 vulnerabilities, 10 of them critical, in Firefox 3.0.12. Five of the 11 vulnerabilities are in the browser’s rendering engine, a frequent target of Mozilla’s patching. Mozilla will discontinue support and stop security updates for the older edition approximately six months after the release of 3.5.0. The browser has another few months to live, with its “kill date” set in January 2010. Mozilla also patched critical vulnerabilities in Firefox’s use of Adobe Flash, in open-source font-rendering libraries and several other parts of the browser.”]
Source: https://www.csoonline.com/article/2124211/mozilla-patches-11-flaws-in-older-firefox-3.html