@iemf install this opera add-on so you can download chrome extensions, then simply install the ecosia chrome extension

Additionally, you can add ecosia manually to search engines in opera://settings/searchEngines.

Or you use this opera add-on
which allows you to set a custom new page. Simply put ecosia there and whenever you open a new tab, it will open with ecosia.

@iemf install this opera add-on so you can download chrome extensions, then simply install the ecosia chrome extension

Additionally, you can add ecosia manually to search engines in opera://settings/searchEngines.

Or you use this opera add-on
which allows you to set a custom new page. Simply put ecosia there and whenever you open a new tab, it will open with ecosia.