YOU SAID:
Now you can browse privately, and other people who use this device won’t see your activity.
INTO JAPANESE
今個人的に、参照することができ、このデバイスを使用して、他の人があなたの活動を見ない。
BACK INTO ENGLISH
To see in person, now you can by using this device, others don't see your activity.
That didn't even make that much sense in English.