Turns out using Yahoo for this doesn't quite work across the board on
all with different userscript injectors due to some security policy
headers that Yahoo sends. So back to DuckDuckGo it is :P
There's legit reasons why I might want to search with DuckDuckGo, and no
reason why I might want to search with Yahoo. Specially as Yahoo now
uses Bing to provide search results.
Also, in my very basic testing, Yahoo actually produces a smaller and
faster to load results page. So I might as well use that for the sake of
performance, though I doubt it makes much of a difference, as the
redirect logic runs immediately as the page starts loading.
