Native Tab Grouping / More Customizable Tab bar

[Vinci480]

I'm personally a heavy tab user but have always wondered why there is almost no support for tab grouping or customization in the native tab bar in Firefox.

I think making it able to group like Google Chrome does for example or at least giving more access for extensions and add-ons would significantly improve the UI in that regard.

[ElAlecs]

Even have this option in two-way sync, able to see in desktop the tabs in other devices by groups or send a tab to a group from a device to another, or maybe something like Edge workspaces but instead of sharing the workspaces with other person, share between devices, in that way you can keep working in a group "session" no matter in which device you are.

Is not necessary sync cookies, just the tab(url)