chromium/chrome/test/data/extensions/api_test/keybinding/dont_overwrite_system/manifest.json

{
  "name": "An extension that tries to overwrite system keybindings",
  "version": "1.0",
  "manifest_version": 2,
  "background": {
    "scripts": ["background.js"]
  },
  "permissions": ["activeTab"],
  "commands": {
    "ctrl_f": {
      "suggested_key": "Ctrl+F",
      "description": "Send a ctrl f test message"
    },
    "ctrl_d": {
      "suggested_key": "Ctrl+D",
      "description": "Send a ctrl d test message"
    },
    "alt_shift_f": {
      "suggested_key": "Alt+Shift+F",
      "description": "Send an alt shift f test message"
    }
  }
}