This is a great plugin and I love being able to open URLs and search google, amazon etc without actually visiting the landing page first - like hitting 'o-g <search>' or 'o-a <search>' for example. However with the support for multiprocess not being there, I decided to move on to vimfx which is somewhat more minimalistic and less easily configurable compared to vimperator, but in my experience so far it is really smooth even though it lacks that particular feature(among others) that I highlighted earlier in the comment(well not entirely, you can still google search in a similar way). Overall though vimperator was/is a great plugin, especially for people who are really used to vim and hate switching to mouse for browsing the web.