Always best to use at least two -- even three! -- different browsers on all devices. Try both chrome and mozilla firefox or safari. These can operate indepedently on your smartphone, tablet, computer.
imo one of the better (and free) security softwares is from AVG.com and can work on many devices.
Whatever security package you do use, you should have only one single package actuve at any time.
If you do "civilian" personal or business browsing, you should use a second browser for hobby browsing to help avoid crossover leakage.
Originally Posted by ck1942
and, do not allow your browsers to copy the contacts/history between each other.