Today Google releases Chrome 30 FINAL for Windows, Mac, Linux and Chrome Frame and the latest build includes a new search option -- right-click an image, select "Search Google for this image", and you'll get a list of web pages containing matching graphics.
The Chrome Releases blog reports that version 30 also includes "a number of new apps/extension API's" and "lots of under the hood changes for stability and performance". The technical details are available in the SVN Log, if you happen to be interested.
As ever, though, the main reason to upgrade is probably the security fixes. There are 50 of them this time, which is either impressive, or worrying, depending on your point of view.
The Google Chrome blog also reports that Chrome for Android is about to gain three new gestures. Swiping horizontally across the top toolbar switches tabs; dragging down from the toolbar opens the tab switcher view, and dragging down from the menu now both opens the menu and allows you to select an item, without having to lift your finger.
The Chrome for Android updates will be rolling out to all users "over the next few days", but Chrome 30 FINAL for Windows, Mac, Linux and Chrome Frame is available now.