Additionally, adb root is only accessible if USB debugging, which is off by default, is turned on, and any sort of root access would still require physical access to your device," OnePlus said in ...

Both adb enable-verity and adb unroot are simply offered to reverse the effects of the adb disable-verity and adb root commands, respectively.

Additionally, adb root is only accessible if USB debugging, which is off by default, is turned on, and any sort of root access would still require physical access to your device.

Root Now that adb access is working, it turns out rooting the Fire is quite simple, and the infamous SuperOneClick does the job. For instructions, see this discussion over at xda (thanks, Mitchell!).