Additional System Details
- User Agent: Mozilla/5.0 (Android 8.1.0; Mobile; rv:66.0) Gecko/66.0 Firefox/66.0
I can't speak for Opera, but for Firefox:
Mozilla does not operate a Firefox-branded search site. Instead, Firefox includes "search plugins" for several different search engines including Google, Bing, and DuckDuckGo. To set your preferred site for search results, see this article:
Can you get it working the way you like?
I am running Microsoft 7
Here's the article for the "desktop" version of Firefox: