The app will automatically download the clean firmware files directly from secure servers, bypassing Sony's broken download structures.
One of the best things about the PS Vita is its homebrew community, which has created a wide range of custom applications and games for the device. With firmware 3.73, you can take advantage of various homebrew tools and applications, such as: ps vita firmware 373 download better work
To get your Vita "working better," you'll need both the official firmware files (for the downgrade) and the modern exploit tools. The app will automatically download the clean firmware