Over time, we've seen helper apps evolve to become plugins, and more recently, have seen many of these plugin capabilities get incorporated into open web standards.
For most users, you’ll want to use i OS 9.0.1 IPSW simply because it’s easier.
Vendors like Microsoft and Apple have had to work continually over the years to keep up with security fixes.
Apple also shared Adobe's Flash news on its Web Kit blog, and the company says it is working with Adobe and industry partners on the transition from Flash to open standards.
The average i Phone, i Pad, or i Pod touch owner should install the i OS 9 software update through the Settings app in i OS, or through i Tunes as usual.
Using a firmware file offers little benefit to the average user and simply complicates an otherwise easy update process.