Quick details:
1. Type about:config at your Firefox address bar.
2. Type browser.search.order at the filter bar.
3. Change browser.search.order.1 to Google.
Why?
I’m a big of del.icio.us and I thought it was a great news when the official Firefox extension was made available. Now you can tag and search your saved bookmarks even more easily.
However, I dislike the idea that it wants to be the first search engine of Firefox without even getting my permission first. Google is still the place I would go to when I want to look for something. Being someone lazy to take the hands off the keyboard, I want to be able to find something quickly by just pressing CTRL+K (Firefox’s keyboard shortcut for search). If Google is not currently the search engine, I can simply press CTRL+Up repeatedly before I start the search. With Google search engine as the first choice, you’ll never miss it because the scroll stops at the top and bottom position.
Note that you’ll have to do it everytime you upgrade your del.icio.us extension. Ouch.
Actually I have del.icio.us 1.1 extension installed but it never changed my seach engine order. I am using it in Linux though, although that shouldn’t really matter.
The same as akash here. But you can change this very easily:
* Type about:config in the address field of your Firefox
* Enter “search” in the filter window. You will see a string “browser.search.order.1″, set the value to Google.