This extension lets you split multiple tabs from a window to a new one: https://addons.mozilla.org/en-US/firefox/addon/multiple-tab-handler/ https://addons.mozi

This extension lets you split multiple tabs from a window to a new one: https://addons.mozilla.org/en-US/firefox/addon/multiple-tab-handler/ https://addons.mozilla.org/en-US/firefox/addon/multiple-tab-... It's not as pretty or intuitive as Chrome's “shift-click and drag” approach, but it works well enough.