Use of the address bar in Firefox is too slow. The address bar is apparently also known by the name "Smart Location Bar", alias "Awesome Bar". There is a very notisable delay when typing in the address bar and opening the typed stuff. For example, "wt slow" to lookup the word slow in Wiktionary (requires setup for "wt" to work).
Fortunately it can be turned off:
Open about:config (type or paste in the address bar(!))
Find browser.urlbar.maxRichResults. E.g. type maxRichResults. Change the value from 12 to 0.