Browsers command memory in order to operate. This comes into play when you have limited hardware space and the operating browser fails to work properly because it commands more memory. When you consider the different browser, you will find that opera commands the least memory. Hence, it is the most memory efficient.
It is followed by Firefox. When we look at Chrome, we find that it uses the highest amount of memory. This makes it inefficient when it comes to handling space and using limited memory on the ROM. It is important to consider these problems when you are trying to stay in a narrow memory limit.