This is mainly uses for lightweight/dated device that are either low spec or slow (PSVita for example). There not much to do here but here couple links and walltext here if you bored
I recently took interest with jailbreaking, consider how easy it is these day. PSVita being one of unique cases and it still have active community of Vita Jailbreaking to this day. Consider it have an better controls (Duel Joystick; an upgrade from single joystick on PSP), it actually one of more superior device to jailbreak; not only can you emuate retro games (N64, GBA, even a damn Basilisk II an Mac OS 8.1, as well as GoldSrc with Xash3D), you can also managed to run games such like GTA III (and SA as well) and also PSP Emulation that treat the entire device as PSP (Adrenaline).
I also did it with PS3 and one of my 12 years old iPod 2nd Gen; There ain't much to do to them since they're bit too old for people to give an damn but an nice time-wasting to do, or hobby even
PSVita, while being sold lot less then 3DS and PSP combined, is actually an powerful handheld when jailbroken. Start here
Your Vita might be 3.74; if so, get HenIO first and then get VitaDeploy, select "Install a different OS" and then click "Quick 3.65 Install". This will install Firmware 3.65 and will give you an permenant Jailbreak. Anything beyond 3.65 is temp; when restart, it will revert back to Normal/unjailbreak due to patch Sony made while ago.
VitaShell allow you to share files from your PC to Vita as well as browse files inside your Vita. You can plug with USB or uses FTP with FileZilla
Jailbroken PSVita only; this added SSL security since Vita Web is outdated; check this page if it work.
VitaDB is homebrew browser, an bit more better than other homebrew browser out there
AutoPlugin allow you to install plugin on Vita (DRM-Free, Overclocked, etc).
Adrenaline is PSP Emulation; like PSP Operating System on to your PSVita. All you need to know.
You will need to downgrade firmware to 3.65 to make it work; it will not work otherwise!
Homebrew Browser for PSP, also work on Adrenaline
Reddit thread on how to get Internet Radio on PSP, also work on Adrenaline
yes it work, with iTLS-Enso installed of course
Site still up all these year, no idea if Ruffle work with these device but if you install Flash on Adrenaline (Using "Recovery Menu" by hitting "Select" button), it can work