You can try using this method to see if it disables multitasking. make a backup of the plist though just in case. Be advised that editing .plist files can be scary, it may mess up the device and force a restore so I would NOT recommend doing this method unless it's known for sure to work
I'm not sure if there's a tweak to disable multitasking bar though, never thought about disabling it
been googling this, and...think i'm gonna just leave it. simple enough to NOT double-click the home button (and ultimately, the app switcher is there IF i ever want it).
The app switcher can be disabled with activator (or at least prevent it from showing). Just set the home button to 'do nothing' when double-clicked on the home screen or in apps. Or assign any other action to it.
The app switcher can be disabled with activator (or at least prevent it from showing). Just set the home button to 'do nothing' when double-clicked on the home screen or in apps. Or assign any other action to it.