How to Install Firefox 15 on Ubuntu

Mozilla Firefox 15 has not yet been released, but it will bring features such as initial native support for PDF files, support for SPDY networking protocol v3, better performance by enchancing WebGL (including compressed textures), better memory usage for add-ons, and much more. Canonical will most likely update its supported Ubuntu operating system to Firefox 15 as soon as Mozilla releases it at the end of the month, but if you want it now, follow our step-by-step (with screenshots) tutorial.