Chrome: Having a lot of Chrome extensions can be great, but you probably don't need all of them all the time. Context allows you to place extensions into profiles so you can switch between different browsing experiences.
You can set it up in any way you see fit, with specific extensions running while you're shopping, working, reading news or whatever else you might do. It's especially handy if you enjoy using more visible extensions some of the time but don't want them running during normal browsing. Set up is as simple as creating a profile and dragging the the extension to it, then clicking on the toolbar to switch between them.
Context [Chrome Web Store]