https://addons.mozilla.org/en-US/firefox/addon/temporary-containers/ https://addons.mozilla.org/en-US/firefox/addon/temporary-con... This seems to be one, foun

https://addons.mozilla.org/en-US/firefox/addon/temporary-containers/ https://addons.mozilla.org/en-US/firefox/addon/temporary-con... This seems to be one, found from https://news.ycombinator.com/item?id=19026396 https://news.ycombinator.com/item?id=19026396