What drop-down menu are you referring to? If you mean the autocomplete suggestions below the address bar, that would be handy. I can't think of any way to add that. Here in support we work with the Firefox we have today and can suggest relevant features, settings changes, and workarounds. You can submit comments and suggestions through one or more of the following links: * Feedback: https://qsurvey.mozilla.com/s3/FirefoxInput/ * Discourse: https://discourse.mozilla.org/c/firefox-development * Reddit: https://www.reddit.com/r/firefox/ * Twitter: https://twitter.com/firefox * Facebook: https://www.facebook.com/Firefox