Newport Aquarium offers families plenty to see, do and learn during every visit. The world-class facility has been ranked among the top aquariums in the country. Newport Aquarium showcases thousands of animals from around the world in a million gallons of water, including Sweet Pea and Scooter, the Newport Aquarium's ultra-rare shark rays. Each day begins with a special penguin parade, a show featuring one of the Aquarium's African Penguins.
Connected or not, Safari uses the least memory. Firefox, as expected is still the reigning memory hog even without add-ons. None of them slowed down my computer though. CPU usage was only 4% at the most on any browser that I open at a time.
If this is the case, try to clear browser cache. The web browser stores the cache of your visited websites, including web pages, images, sounds, etc. Cache can reduce the loading time of the previously visited pages; however, as it gets bigger and bigger and occupies more and more hard disk space over time, lots of problems will occur.