Mozilla debuted Firefox 15 just a few days ago, and unlike most of the recent releases, version 15 includes some major changes. The most notable among them is an improvement in the way the browser uses and releases memory. Mozilla has been working to fix the memory leak problem that has been plaguing the browser for years, and although I won’t hold my breath, Firefox 15 is showing appreciable improvement. According to the organization, the developers have managed to patch Firefox 15 solving the most common add-on leaks. The best part is that add-on developers don't have to do anything as the fix applies to all add-ons.