This simple Firefox Web Extensions completely disables browser tabs, by always opening a new Window instead. Usage Just install it. There is no configuration, because there is only one feature. To hide the tab bar, check out https://www.reddit.com/r/firefox/comments/48wnba/css_code_to_hide_the_tabbar/ Permissions

tabs: Required to access the tab title, to determine if a tab is the "Customize Firefox" tab (see issue #2)

License Firefox-notabs is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. Firefox-notabs is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with firefox-notabs. If not, see http://www.gnu.org/licenses/.