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.

[trotos]

@BtaWlffor some reason now it works. There are 2 entries in my about:config. When I first tried it there was only one. I activated both and the "add to" is now visible.

[amundv]

Does not work for me either in version 133.0.3 (64-bit), but I have Tree Style Tab installed along with the following userChrome.css :

#main-window[tabsintitlebar="true"]:not([extradragspace="true"]) #TabsToolbar > .toolbar-items {
  opacity: 0;
  pointer-events: none;
}
#main-window:not([tabsintitlebar="true"]) #TabsToolbar {
    visibility: collapse !important;
}

#main-window[tabsintitlebar="true"]:not([extradragspace="true"]) #TabsToolbar .titlebar-spacer {
        border-inline-end: none;
}


@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");

.treestyletab-tabbar-toolbar {
    opacity: 1.0 !important;
}

.tabbrowser-tabs[treestyletab-mode="vertical"] {
    opacity: 1.0 !important;
}

.tabbrowser-tabs[treestyletab-mode="vertical"] .tabbrowser-tab {
    opacity: 1.0 !important;
    text-shadow: 0px 0px 0px white !important;
    margin-top:    -2px !important;
    margin-bottom: -2px !important;
}

#sidebar-box[sidebarcommand="treestyletab_piro_sakura_ne_jp-sidebar-action"] #sidebar-header {
  visibility: collapse !important;
} 

[jakep]

When you choose "Save and close group" from the right-click context menu (when clicking on a tab group), where does the group/tabs go? I can't find them anywhere.

[BtaWlf]

@jakep   That option is disabled for me

EDIT: More interesting is that is seems to be enabled by default for the nightly builds with all the options enabled.

EDIT 2: Found the saved groups under the drop-down menu arrow on the right of the tabs

[phoenixsoap]

Thank you for putting in tab groups! This is great! I can finally move away from Safari.

I understand it is in development and not finished, and I assume that means it will be refined and expanded. It is useful as it is now but there is one primary thing I would like to see.

I really like how I can completely unload a tab group in Safari by switching the window to a different tab group.

This way I can have one window open with the focus I currently have and then when I change focus, I change the window group. For example the window could be "Work" but then after work I change it to "Recipes". The nice thing about this is I can have a lot of tabs "open" but they are not using resources.

I noticed you can't move a tab group to a different window, or even move the position of the tab group in the current window. I hope both of these actions become possible.

I do like the overall implementation, it's a great start! Don't let the complainers get you down, your work is very appreciated!