Press and hold three buttons simultaneously for a few seconds: .
Historically, firmware 3.73 was a major milestone for the homebrew community because it was fully exploitable using . This exploit allowed users to run a custom firmware bootstrap directly from the stock browser or content manager.
Many of the best PS Vita plugins, such as SD2Vita (which allows you to use standard MicroSD cards instead of expensive proprietary Sony memory cards), run much smoother on older firmware builds. The Better Approach: Downgrading to Firmware 3.60 or 3.65