You could solve this problem in two ways that are pretty easy to setup and handy to use, IMO. 1. You can open a new window, move the new tab in the "Work" cont

You could solve this problem in two ways that are pretty easy to setup and handy to use, IMO. 1. You can open a new window, move the new tab in the "Work" container (if you use an extension [1] you can just type "co work" in the address bar), and use alt+c [2] to open new tabs in that window, ensuring they are all opened in your "Work" container. 2. You can create a separate profile for work, running "firefox -p" to first create it, and then create a desktop shortcut that links to that profile. This way you'll have two separate profiles on two separate Firefox "icons" that that you can launch at your will. There are ways to do this both on Windows and Linux (not sure about Mac, never used that), and the setup needs to happen only once. I've had separate Firefox profiles for years now that just keep working without any problem. I even ported some profile folders between different installs (same OS), and to my surprise they still didn't break. [1] https://addons.mozilla.org/en-US/firefox/addon/search-and-switch-containers/ https://addons.mozilla.org/en-US/firefox/addon/search-and-sw... [2] https://addons.mozilla.org/en-US/firefox/addon/new-container-tab/?src=search https://addons.mozilla.org/en-US/firefox/addon/new-container...