How can I show search querys in the URL bar instead of URLs? (and for all search engines, including custom ones)

I often do searches with multiple search engines and extras with the same query but with site:reddit.com added at the end. Being able to press CMD L to focus the URL bar, and then CMD C with all the text selected would make things a lot faster. This was added months ago to Firefox but it looks like it was removed now.

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