Firefox has had it native since firefox 4. See this article: http://kb.mozillazi...

		TheDong on Nov 16, 2016 \| parent \| context \| favorite \| on: Firefox 50.0 Firefox has had it native since firefox 4. See this article: http://kb.mozillazine.org/Location_Bar_search#Location_Bar_s... You can enter "% string" into the location bar, and it will suggest switches to open tabs which contain that string either in their title or URL. I've been using this little-known location bar feature for a long long time.

Hm, then 48 just changed the way it works, because I've never seen it before that one.