I recently found out a life-changing tip with Firefox. Right click any search box on any website and hit "Add keyword for this search." You can then assign a prefix which you can use in the address bar to search that site. For example, I have these set up:

Search YouTube: tube <query>

Search Urban Dictionary: urban <query>

Search Amazon: amazon <query>

Search Wikipedia: wiki <query>

Yeah, the keyword quick search is my most used feature. I use short keywords to save typing.

g - Google

gg - Google Group

b - Bing

d - DDG

q - Yahoo stock quote

s - Stackoverflow

w - wiki

y - Youtube

dt - Dictionary

t - Google Translate

Opera has had this feature forever, since around 2001. Long enough ago that it shipped with search keys for Altavista and Lycos along with Google. The feature was a primary reason I started using Opera in the first place.

Originally you had to dive into a config file to add non-default search providers, but it's now in the UI just like Firefox, right click any text field and select "Create Search".

dt - Dictionary

that's clever.

I've long done that myself. It's amazingly useful. Every type of search I use regularly is in there, and I never actually need the search bar itself.

Control-K will highlight the search bar and Control-Up/Down will change the search engine.

On Mac, up/down goes to the beginning and end of the line but cmd-up/down switches engines. Thanks for the hint!