When Firefox performs a search from the Address Bar, it queries the search engine string you have setup within Firefox. If it’s using Yahoo, you can switch to Google. Don’t like Google? Use DuckDuckGo. Here’s how to switch which search engine Firefox searches when you use the address bar to search.
1. In Firefox type about:config in the address bar and press ENTER.
2. Locate and double-click the entry for keyword.URL
3. Set the value based on which search provider you would like to use for your address bar searches. Here are a few search strings you can use.
Source : technipages
Nếu là bản mới (ví dụ như bản 12 mình đang dùng) thì chỉ việc Right-click lên Address Bar chọn Edit Search Engines là xong
Còn bản cũ hơn thì làm theo hướng dẫn :
This article applies to the Google Chrome browser on Windows, Mac, Linux, and Chromebooks.
In Google Chrome, the address bar that sits at the top of the browser window (sometimes called the “omnibox”) doubles as a search box. You can specify the search engine that the address bar should use by default for your searches.
If the search engine you want to use isn’t on this list, you can first add it as a new search engine option.
If the “Make Default” button doesn’t appear for the search engine you’ve selected, you may need to edit its URL.