If you set Chrome to launch with the tabs you last had open, the browser's startup time can take forever. That's especially true if you last had 10 or more tabs going. The problem is that Chrome starts loading all your tabs at once, which can be a drain on resources. A new extension called Native Lazy Tabs helps fix that problem.
Native Lazy Tabs stops all tabs but the one currently in focus from loading. The other tabs will load when you switch to them. This is similar to the behavior Opera introduced in version 41 of its browser last October.