With regards to Chrome, that's pretty good to know about. Have you tried them? Did you notice any change in speed at start up or page rendering? Any CPU usage increase?
I've tried other addons, but I haven't tried those two (I'm not a gestures enthusiast). I've had mixed results, but I was playing with it when the installation process of an addon was not very intuitive, and highly dependent on the version of Chrome installed. It's apparently gotten easier as Google has introduced more support for such efforts. There didn't seem to be much of an impact on performance, but nor was I overladen (like I tend to get with Firefox).
However, I had problems with a couple of sites that worked fine before the upgrade to the development version, but ceased to operate correctly afterwards, so I've since downgraded. I haven't tried again in some months, so those issues may have been ironed out. So I've been going back and forth between Chrome, which is quick and great for most purposes, and Lunascape for the odd site that refuses to work in Chrome (I'm looking at you, Netflix Instant Play and Microsoft OfficeLive).
EDIT: I retract the disparaging remark about Netflix. I just tried it, and the Movie Viewer works in Chrome once again, and now I don't even have to change the useragent to IE to make it work. (Yay!)
One "pre even using it impression" is that I downloaded the 9MB from the site, as part of the install it proceeded to download webkit and gecko .exes adding ~19MB to it. For testing purposes alone (not its other features) one could do alt-tab and load sites in the 'original' browsers.
Sure, but that takes a bit more than 2 quick clicks on the engine icon in the lower left corner. The other way you've got involves copying the address from the address bar, launch the other browser, paste the address, hit Enter (except in Chrome you can right-click to "Paste and Go") and then after any change you make to the site, you have to Alt+Tab around, remembering to do a manual refreshes as you go back and forth between each browser. It's surely not rocket science, but if you need to make a series of small changes, it's unwieldy and can get confusing.
On the other hand, the various small interface issues still make me loathe to use Lunascape as my main browser.