Remap Insert and Delete keys to Browser Tab Navigation - Karabiner

karabiner.json

{
  "description": "Remap Insert and Delete to Browser Tab Navigation",
  "manipulators": [
    {
      "description": "Insert to Ctrl+Shift+Tab",
      "from": {
        "key_code": "insert"
      },
      "to": [
        {
          "key_code": "tab",
          "modifiers": ["left_control", "left_shift"]
        }
      ],
      "type": "basic"
    },
    {
      "description": "Delete Forward to Ctrl+Tab",
      "from": {
        "key_code": "delete_forward"
      },
      "to": [
        {
          "key_code": "tab",
          "modifiers": ["left_control"]
        }
      ],
      "type": "basic"
    }
  ]
}