https://addons.mozilla.org/en-US/firefox/addon/multi-account-containers/

https://addons.mozilla.org/zh-TW/firefox/addon/switch-container/ 

https://addons.mozilla.org/zh-TW/firefox/addon/sort-tabs-by-url/?src=api (sort by domain add-ons)

https://qsurvey.mozilla.com/s3/FirefoxInput/

could you make firefox has work stage feature? just like I can save many tabs to a work stage once, and next time I just need to click on the work stage firefox could restore the tabs in the work stage. I'm using bookmark folder to do this, but there are no color distinct between different work stage, all tabs' color are the same, and I need to find the tab I want from a lot of tabs. I'm using https://addons.mozilla.org/en-US/firefox/addon/multi-account-containers/ to assign different color to different work stages' tabs, but the add-ons is still simple and crude, it can't restore work stage tabs and even can't transfer the viewing tab to another color. I'm using https://addons.mozilla.org/zh-TW/firefox/addon/switch-container/ to do this, but the page will reload and the form I filled but not send yet will disappear. Though all I need is to change it's color. And I can not sort the same work stage together by using this add-ons, and need to sort by hand. I think the feature on sorting, categorizing of opening tabs are very important and promising. I hope the feature would add to firefox. https://addons.mozilla.org/zh-TW/firefox/addon/sort-tabs-by-url/?src=api (sort by domain add-ons) my English wasn't well, if you couldn't understand what I said, maybe you could translate it yourself. I also sent this to https://qsurvey.mozilla.com/s3/FirefoxInput/ in traditional Chinese, but I don't know is there the right way to suggest this. And I don't know whether the developer could read traditional Chinese or not, so I send here again. 請問能讓firefox內建工作階段的功能嗎? 就是類似下面這個附加元件的分類方式 https://addons.mozilla.org/en-US/firefox/addon/multi-account-containers/ 然後可以選取特定的tabs存起來作為一個工作階段，下次直接選取此工作階段即可還原所有此工作階段內的頁籤，並將不同工作階段的tabs以不同顏色標記。 還有可以整合類似 https://addons.mozilla.org/zh-TW/firefox/addon/switch-container/ 的功能到上面的container tabs附加元件，就是直接轉換目前的tab(或是一次選取多個tabs)到不同的工作階段(或是說工作群組比較好)。 我認為在tabs的分類、控管上下功夫在現在電腦效能越來越好、分頁越開越多的時代是非常有潛力的。 ex:https://addons.mozilla.org/zh-TW/firefox/addon/sort-tabs-by-url/?src=api 儘管目前已經有些add-ons有這些功能，但每款add-ons功能都不太完整(甚至可以說是有些陽春)且都有其不足之處。 希望以後這些功能都可以內建在瀏覽器中!!