Since Opera =< 12.x, I haven't found a single browser that had a proper implementation of mouse gestures. Firefox with its FireGestures came close, but it's heavy on your CPU and lacks a quick way to customize behaviors. For Chrome, there isn't a single extension that works properly or isn't too limited in its gestures or supported functions. Well, there was, but that one got pulled because of its built-in spyware and adware. What's more, in pages like chrome://extensions or the New Tab page these extensions have no permission to function, so you'll keep getting annoyed by not being able to use the gestures. Maxthon was the only one that came close to Opera's functionality, but you still can't add your own gestures or define your own behavior/function. So I was looking for a neat little tool to use mouse gestures, possibly even globally, that wouldn't be too invasive or use up too many resources. Finally I've found it.
Note: this review was written in the good ol' Presto days, before Opera became another Google Chrome clone, while being bad at it, too.
When having a get-together with some friends, one of us was anxious to show us a specific movie. None of us, however, were in the mood for a movie, being sure that we'd fall asleep. Nevertheless, we gave in and watched the movie. It was utter brilliance that reached us. Don't get fooled by the typical prejudices about films marked as 'science fiction', it simply doesn't apply to this movie. Furthermore, don't try to read anything about the movie before you see it, just watch it, it'll take only 80 minutes of your precious time, and it'll be well worth it. Jerome Bixby's The Man from Earth was the best movie I saw in 2007, without a doubt.