Indeed, stop taking away the drop down arrow for most frequented list from the address bar. What is really better than clicking the arrow and choosing from the list? I'll give you a hint: nothing

   https://support.mozilla.org/en-US/questions/1283911#answer-1303777
   https://support.mozilla.org/en-US/questions/1284030#answer-1304125
   https://www.userchrome.org/megabar-styling-firefox-address-bar.html#mbarstyler 

From jscher2000 https://support.mozilla.org/en-US/user/jscher2000 Chosen Solution **UPDATE** The original solution was for Firefox 75. Due to changes in Firefox 77, the original solution is obsolete and there are new options. Firefox supports an optional style sheet file named userChrome.css that we can use to modify the toolbar area, including taming the expanding address bar. Setting up your first userChrome.css file is about a 10 minute project, so when you have time to dive in, here are some threads to check out: https://support.mozilla.org/en-US/questions/1283911#answer-1303777 https://support.mozilla.org/en-US/questions/1284030#answer-1304125 https://www.userchrome.org/megabar-styling-firefox-address-bar.html#mbarstyler More background on userChrome.css files: https://www.userchrome.org/ I tried this and it solves the problem.