Enhance Tab group features with keyboard shortcuts

[n9]

Hello, I'm currently using vertical tabs and tab groups features in firefox and am extremely in love with both of them so here are some suggestions to make these more powerful. These are what I assume simple to implement but have very high impact on UX.

1. Multiple tab select:

While using tab groups, I often want to select multiple tabs and don't want to use the mouse to do so, for which this suggestion: Keyboard Shortcut to Select multiple, or all Tabs - Enhancement Suggestion would be extremely useful. My recommendation is to also implement Ctrl+shift+alt+home/end to select tabs to the beginning and tabs to the end. This will also allow selecting multiple tabs and close with ctrl+W very quickly.

PS. also some missing keyboard shortcuts such as this Tab wrap - ctrl + home or ctrl + end would also be really useful.

2. Keyboard shortcut to group selected tabs:

Finally add a keyboard shortcut to group the selected tabs. Currently I'm testing nightly vertical tabs on-hover and I find it clunky to group tabs properly so this not only gives users more options but makes unexpected ff UI behaviors manageable. 

[Jon]

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