How do I change the default search engine in Mozilla Firefox?

@virginie 

To change the default search engine in Mozilla Firefox, follow these steps:

1. Open Mozilla Firefox.
2. Click on the three horizontal lines in the top-right corner of the screen.
3. Click on "Options."
4. Click on "Search" in the left-hand menu.
5. Under "Default Search Engine," click on the drop-down menu and select the search engine you want to use as the default.
6. Close the "Options" tab.

Your new default search engine will now be used whenever you search in the Firefox search bar or address bar.