Many Google Chrome features aren't enabled by default either because they're not ready for primetime or they're too advanced for normal users. Fortunately, recent Chromium build added a new internal page "about:labs" that lets you enable some advanced features.
"Tabpose is currently the only lab on Mac, tabs-on-left the only lab on Windows. about:labs shouldn't be visible on stable channel. Tabs-on-the-left is especially useful on widescreen monitors, while tabpos