You are currently able to select multiple tabs by pressing CTRL while left clicking multiple tabs. As soon as you open the context menu of the selected tabs you are able to duplicate the tabs or do some other actions. However, it is neither possible to add those selected tabs to a collection, nor to add them to your favorites. You can only do this with one tab or with all opened tabs. I would find it useful to have the function of adding the selected tabs to a collection or your favorites.
What do you guys think about it? Is a similar feature already planned?