No options, no keyboard shortcuts Rated 2 out of 5 stars
Okay, good idea, but bad execution.
For starters, I'm using this with omnibar. So I already can just type "cats" to search cats with the current search engine, and use ctrl+scroll wheel to change engines. But this extension gives me categories, so hey, that's great, right?
Well I don't want the categories shown on the freaking bar. And there's no option to get rid of them, or move them over to be inconspicuous. They're noisy and distracting. As I type, they fade and disappear, but it's still aesthetically displeasing. Plus, if I click the bar to type, there's a tiny window where I can click rather than the entire bar I used to get. Quite a UI problem.
Secondly, the categories. If I want to type the category, I can't cycle through the options with any key I know of. So if I do "news:" I can't change it from CNN without using the mouse. I'm a keyboard guy, so this is disappointing. I normally just use Google for everything, but if I'm offered this category search for different engines, then why can't I use keyboard shortcuts to cycle? My normal keyboard flow doesn't get extended with this plugin.
In general the lack of options and shortcuts makes this good idea pretty ugly and limited.
You can type "n" then press [tab] to activate news. If you hit [tab] again, you can switch to another news provider.