Both Chrome and IE use multiple processes to isolate tabs from each other, to make sure that one tab doesn’t kill the whole browser. Firefox, on the other hand, just uses a single process for everything.
Rather than pulling out a calculator and adding them all up, you can just open up Google Chrome, and type in about:memory into the location bar to see a full list of each browser’s memory usage.
On my test system with 6 GB of system RAM, I’m running the Development channel version of Chrome, and I’ve got about 40 different tabs open, which is why the memory usage is so high. Firefox has 8 tabs open, and IE is enjoying being opened for the first time in forever.
Want to help cut down on memory usage and keep your Chrome browser running fast? Disable all unnecessary extensions, and then make sure you disable any plug-ins that you don’t need either.