Most browsers are designed to make things easier for the everyday man to browse the web (A notable exception is IE, which is most likely just a sadistic joke). Rombis, however, is a browser aimed at power users: users who frequently have dozens and dozens of tabs open and wish to manage them more easily.
Rombis has two tab bars: one vertical and one horizontal. The vertical bar organizes all your tabs by site, and the horizontal bar lists the pages within your active site. This management system allows you to view hundreds of tabs without getting lost.
Search as you type is enhanced with regular expressions. Not only that, if you use the global search, each tab will indicate how many results it has. No longer are you limited to searching for exact text on a single page.
Every action will have a keyboard shortcut. Actions can be duplicated by typing a number in advance, like in vim.