[kuschku]

Actually, Firefox has it natively since 48. Just enter the title in the URL bar, and it'll suggest going to that tab.

[TheDong]

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.

[kuschku]

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