What I'd like would be a simple way to manipulate multiple tabs matching a pattern at once. Press shortcut, then e.g. "githu", and it highlights all tabs match

What I'd like would be a simple way to manipulate multiple tabs matching a pattern at once. Press shortcut, then e.g. "githu", and it highlights all tabs matching the pattern (from github), and then you could close them with Ctrl+w, or drag and drop them to a new window. It would display the tabs either in a popup window (in a regular list view), or just highlight them in-situ at the top of the window. Also nice would be to close all tabs older than x hours, except for example GMail. You'd press the hotkey, then have it somehow select the old tabs, and then with ctrl+click deselect the one you'd want to keep. Admittedly, a power-user function, but something I could really use often.