The Option key is a powerful ally in the transition from new, beginner user of OS X to the power user that you want to be. There are a ton of hidden features in the Finder alone that are hidden behind ...
F2 for previous tab and F3 for the next one. Alternately, you can use the option of activating the Control+Leftarrow and Control+rightarrow in Menubar>Options>Maxthon Options>Tab>Use Control + Arrow ...