in macOS, you can do (1)what you said with a mouse,
or you can use keyboard. Either you (2)press `⌘⇧?` and search for any functionality, or you (3)assign your own customized shortcut from System Preferences -> Keyboard -> Shortcuts.
or you can use keyboard. Either you (2)press `⌘⇧?` and search for any functionality, or you (3)assign your own customized shortcut from System Preferences -> Keyboard -> Shortcuts.
Adding a menu item for "Pin current tab" seems like a pretty straightforward bugzilla request too.