I use bookmark keywords to search various sites in Firefox.

For example, a bookmark to search Amazon:

  Name: Amazon Search
  Location: http://www.amazon.com/s/?field-keywords=%s
  Keyword: ams

So now if I enter the following in my address bar:

  ams keyboard

I am brought to an Amazon search results page for keyboards.

I don't like the tab-to-search version in Chrome very much by comparison. There is a service called Shortmarks that aims to emulate this behavior in Chrome, but I'm not sure how I feel about using it.

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I switched to Chrome about 5 years ago because Firefox was getting slow for me. Recently I am strongly considering switching back. My biggest continual annoyance with Chrome is poor searching of previous visited pages when typing partial URLs into the address bar. The main thing holding me back right now is I am wondering how this will impact me when using a Chromebook.