What sort of advanced search? What did it do, what did it search?

Could it have been an add-on from https://addons.mozilla.org/ ?

Thank you for your reply. It is the advanced search with Google where one can specify the language, the region, etc. It used to be part of the settings and I was using it extensively before reinstalling Firefox. Cheers! Nick

Did you check the Google Settings page?

• https://www.google.com/preferences?hl=en

What I am looking for is this page https://www.google.com/advanced_search , which was directly acceptable through the settings menu in both Firefox and Chrome

You can open the main Google page (https://www.google.com) and click Settings on the bottom bar. In the menu that opens you can find "Advanced Search".

I knew that, that was how I retrieve the link included in my previous message. I am wondering though, why this Advanced search is not included in the settings anymore.

You must ask Google about this. For what it is worth, if I open Google in a PB mode window (i.e. aren't logged in), then I get the gear icon at the top of the results page.

Thank you. That was the answer I was looking for. After signing out of Google the gear icon emerged and under it the "Advanced search". Very strange! It is worth asking Google.