All your addon's were marked as Legacy for more than 6mos and they no longer work with Firefox. https://www.howtogeek.com/333230/why-firefox-had-to-kill-your-favorite-extension/ You maybe able to find comparable Extensions here : https://mozilla.github.io/extension-finder/ Since you have do not send info to Mozilla not ticked I can not help you find what you had. But there is on the Extension Page a Blue Button and a search box there as well as the above url As to settings you will have to elaborate on what you are meaning please. https://www.howtogeek.com/333805/how-to-change-or-customize-firefoxs-new-tab-page/ and https://www.howtogeek.com/333110/how-to-customize-firefox-quantum-and-remove-the-white-space-around-the-title-bar/ As pretty much can make this Browser any way you want to. Other code is available for making like ver 56 round tabs, colour back into Bookmarks folder and more but it is not all in one place ans is being developed by people that like to code and do what they do Please let us know if this solved your issue or if need further assistance.