[
  {
    "label": "p2 ready",
    "thread": "proof-thread-B",
    "tabs": [
      {
        "url": "http://127.0.0.1:18511/p2",
        "canGoBack": true,
        "canGoForward": false
      }
    ]
  },
  {
    "label": "Back over iframe held",
    "thread": "proof-thread-B",
    "tabs": [
      {
        "url": "http://127.0.0.1:18511/p2",
        "canGoBack": true,
        "canGoForward": false
      }
    ]
  },
  {
    "label": "Back over iframe released",
    "thread": "proof-thread-B",
    "tabs": [
      {
        "url": "http://127.0.0.1:18511/p1",
        "canGoBack": true,
        "canGoForward": true
      }
    ]
  },
  {
    "label": "Forward at the same pointer location held",
    "thread": "proof-thread-B",
    "tabs": [
      {
        "url": "http://127.0.0.1:18511/p1",
        "canGoBack": true,
        "canGoForward": true
      }
    ]
  },
  {
    "label": "Forward at the same pointer location released",
    "thread": "proof-thread-B",
    "tabs": [
      {
        "url": "http://127.0.0.1:18511/p2",
        "canGoBack": true,
        "canGoForward": false
      }
    ]
  },
  {
    "label": "boundary ready",
    "thread": "proof-thread-B",
    "tabs": [
      {
        "url": "http://127.0.0.1:18511/boundary",
        "canGoBack": false,
        "canGoForward": false
      }
    ]
  },
  {
    "label": "Back over iframe at history start held",
    "thread": "proof-thread-B",
    "tabs": [
      {
        "url": "http://127.0.0.1:18511/boundary",
        "canGoBack": false,
        "canGoForward": false
      }
    ]
  },
  {
    "label": "Back over iframe at history start released",
    "thread": "proof-thread-B",
    "tabs": [
      {
        "url": "http://127.0.0.1:18511/boundary",
        "canGoBack": false,
        "canGoForward": false
      }
    ]
  },
  {
    "label": "Forward at history boundary held",
    "thread": "proof-thread-B",
    "tabs": [
      {
        "url": "http://127.0.0.1:18511/boundary",
        "canGoBack": false,
        "canGoForward": false
      }
    ]
  },
  {
    "label": "Forward at history boundary released",
    "thread": "proof-thread-B",
    "tabs": [
      {
        "url": "http://127.0.0.1:18511/boundary",
        "canGoBack": false,
        "canGoForward": false
      }
    ]
  }
]