Tab discarding is available as an experiment in Chrome 46 and above. We also have another new feature that allows caching all tab resources locally which works nicely with tab discarding when you're offline. To test out the feature, you can either carry out your normal browsing behavior until your system is in a low-memory mode, or alternatively trigger a tab discard from about:discards by clicking 'Discard tab now'. Similar to tab discarding, tabs can be un-suspended when you need to interact with them again. Future improvements: the tab serializerThe tab serializer is a future piece of work we think may lead to significant improvements on our current approach to tab discarding.