Please see the graduation report here to find out the fate of Universal Search: https://medium.com/firefox-test-pilot/universal-search-retirement-report-3144f765acb5

If this answered your question, please mark as solution.

I read that,did not got anything about my quory.

They did retire this since 2016 and haven't continued since then. if you need more information you should contact those on the page about the project. This is the FF End user forum.

WestEnd said

This is the FF End user forum.

People are welcome to ask for help here on anything that is used in or with the Firefox web browser.

btw the official abbreviation is actually Fx

Is that project- closed merged into Firefox Addon was made

Closed.