Add-on: custom search bar to your firefox

Well, the "add to search bar" firefox add-on can make your life much easier.
If you open, for example, Twitter every  time when you want to find somebody, or if you load Facebook every time you want to search on it...

Then, this add-on is invented for you. You can add any search engine you want  to your Firefox, and you don't
need to open every site you want to search on.
You can download this add-on here: -add-to-search-bar-

Here is a simple .gif to show how this works:

Hope you enjoy !