Change Application ID Automatically
This is a feature I would be happy to pay for.
You can change an apps ID to be 'random' and therefore break it out as its own window/taskbar item but is not remembered when the instance terminates and reloads.
An example is the add-on 'DownThemAll' for Firefox. I like grouping but not for this add-on as I am constantly switching between Firefox and the download manager window.
I realise that I can permanently ungroup for the Firefox app ID but I'd prefer not to as I prefer keeping the taskbar organised (expect in certain circumstances).
AdminRaMMicHaeL (Admin, moved) commented
How would I recognize the "DownThemAll" window?
By it's title?
Grouping by window titles is too much imo.
Since v2.0, though, you can easily ungroup a button, without opening Taskbar Inspector. See here: