MultiBrowser is described as 'Take control of the many browsers that you may have installed on your Mac'. There are more than 10 alternatives to MultiBrowser for a variety of platforms, including Mac, Windows, Linux, Microsoft Edge and Google Chrome. The best alternative is Choosy. It's not free, so if you're looking for a free alternative, you could try Browserosaurus or Browser Select. Other great apps like MultiBrowser are Account Surfer (Paid), Finicky (Free, Open Source), LinCastor Browser (Freemium) and Browser Tamer (Free).