How to Check Browser Memory Usage

For those trying to diagnose computer problems when visiting certain resource-intensive websites, or just the merely curious, Google Chrome includes a Task Manager that displays the amount of memory used by the browser and each tab. This way, you can determine if a particular webpage is using too many system resources, possibly slowing your computer down.

The detailed stats (also accessible by entering about:memory in the URL bar) displays:

1. Private, shared, and total memory usage for the browser and associated processes

2. Private and mapped virtual memory for the browser and associated processes

3. Process ID for each process

Also, as noted in the below screenshot, if you have Mozilla Firefox open some information will be displayed for this browser as well.

Source:  http://malektips.com/google-chrome-memory-usage.html