A plugin for chrome to save the open tabs and restore them after close the browser.
##version 1.0 Refer, the origin files and icon from here: A browser action with a popup that changes the page color https://developer.chrome.com/extensions/samples
chrome storage https://developer.chrome.com/extensions/storage
tab object https://developer.chrome.com/extensions/tabs#type-Tab
a problem about variable key name http://stackoverflow.com/questions/11692699/chrome-storage-local-set-using-a-variable-key-name