There have been plenty of efforts in that direction over recent months, with the most notable being the Chrome Web Store. While the Web Store didn’t take off with any sort of explosive fury, it has become far more popular over time, with top apps receiving tens of thousands of “installations.” To help push these applications to users and make the medium more appealing to developers, Google is now introducing persistent background pages.
A “background page” is any data that is loaded by or to an installed application. Some examples of this include a calendar notification in your browser, a message when a friend wants to start an instant messaging conversation, a notice when you get a new Facebook comment, or even just pre-loading data so an application will load more quickly. This data previously existing in Chrome only when a Chrome windows was open, will now “persist” even when the last window is closed.
This new feature is being introduced through a very simple mechanism: Chrome will continue running in the background even after your final window is closed, just so long as you have at least one “background page” that tells it to do so. Users will then be able to close out Chrome in the same way you would normally shut down a background application: through its link in the system tray or application dock.