https://www.metacrawler.com/

on Firefox (settings > search > Add search bar in toolbar)

install uBlockOrigin

install "Add custom search engine"

Install metacrawler as a search engine

You will need a search URL like https://www.metacrawler.com/search?q=%s

or https://www.metacrawler.com/serp?q=%s

make metacrawler the default search

Then -- do some side-by-side searches with google

With a recent Firefox it gives you the option to use your other search engines

when you click on the search window.

https://www.metacrawler.com/

on Firefox (settings > search > Add search bar in toolbar)

install uBlockOrigin

install "Add custom search engine"

Install metacrawler as a search engine

You will need a search URL like https://www.metacrawler.com/search?q=%s

or https://www.metacrawler.com/serp?q

make metacrawler the default search

Then -- do some side-by-side searches with google

With a recent Firefox it gives you the option to use your other search engines

when you click on the search window.

https://www.metacrawler.com/

on Firefox (settings > search > Add search bar in toolbar)

install uBlockOrigin

install "Add custom search engine"

Install metacrawler as a search engine

make metacrawler the default search

Then -- do some side-by-side searches with google

With a recent Firefox it gives you the option to use your other search engines

when you click on the search window.