Among the ways that Mozilla plans on improving Firefox in 2012 is by way of a number of efforts that could make the browser more secure for a greater number of users.
Mozilla makes incremental security updates with each release — such as the recent Firefox 9 update, which patched several security vulnerabilities. The open source browser vendor also works on making the overall platform more secure, which will be the core focus in 2012.
The hotfix feature will give Mozilla a way to patch a vulnerability or fix an important issue without requiring a full build. In some cases, there won’t even be a need to restart the browser.
Read More: http://tinyurl.com/FireFox-Security