Resolves "New Tab" bug after web content process jettison

App/Browser View/BrowserViewController+WebKitDelegate.swift

@@ -10,7 +10,11 @@ import WebKit
 extension BrowserViewController: WKNavigationDelegate, WKUIDelegate
 {
     func webView(_ webView: WKWebView, didStartProvisionalNavigation navigation: WKNavigation!) {
-        currentTab.loadError = nil
+        if let tab = tabController.tab(forWebView: webView) {
+            // We're alive!
+            tab.contentProcessTerminated = false
+            tab.loadError = nil
+        }
         
         // Check to make sure we have connected to the web content process
         if !currentTab.bridge.webContentProcessConnected {
@@ -120,6 +124,10 @@ extension BrowserViewController: WKNavigationDelegate, WKUIDelegate
         }
     }
     
+    func webViewWebContentProcessDidTerminate(_ webView: WKWebView) {
+        tabController.tab(forWebView: webView)?.contentProcessTerminated = true
+    }
+    
     // MARK: WKUIDelegate
     
     func webView(_ webView: WKWebView, createWebViewWith configuration: WKWebViewConfiguration, for navigationAction: WKNavigationAction, windowFeatures: WKWindowFeatures) -> WKWebView?

App/Browser View/BrowserViewController.swift

@@ -520,6 +520,8 @@ class BrowserViewController: UIViewController
     }
     
     internal func updateTitleAndURL(forWebView webView: WKWebView) {
+        guard let tab = tabController.tab(forWebView: webView) else { return }
+        
         if webView == browserView.webView {
             browserView.titlebarView.setTitle(webView.title ?? "")
             
@@ -531,8 +533,7 @@ class BrowserViewController: UIViewController
         }
         
         // Figure out which tab this corresponds to
-        let tab = tabController.tabs.first { $0.webView == webView }
+        if let tabIndex = tabController.tabs.firstIndex(of: tab) {
-        if let tab = tab, let tabIndex = tabController.tabs.firstIndex(of: tab) {
             tabBarViewController.tabBarView.reloadTab(atIndex: tabIndex)
         }
     }

App/Tabs/Tab.swift

@@ -19,12 +19,8 @@ class Tab: NSObject, SBRProcessBundleBridgeDelegate
     
     public var tabInfo: TabInfo {
         get {
-            TabInfo(
+            updateMetadata()
-                title: loadedWebView?.title,
+            return _tabInfo
-                urlString: loadedWebView?.url?.absoluteString ?? self.homeURL?.absoluteString,
-                faviconData: self.favicon?.pngData(),
-                identifier: self.identifier
-            )
         }
     }
     
@@ -43,6 +39,8 @@ class Tab: NSObject, SBRProcessBundleBridgeDelegate
     }
     public var policyManager: ResourcePolicyManager
     
+    private var _tabInfo: TabInfo = TabInfo()
+    
     private var loadedWebView: WKWebView? = nil
     public var title: String? { get { tabInfo.title } }
     public var url: URL? {
@@ -82,6 +80,7 @@ class Tab: NSObject, SBRProcessBundleBridgeDelegate
     @Published public var favicon: UIImage?
     
     public var loadError: Error?
+    public var contentProcessTerminated: Bool = false 
     
     private var faviconHost: String?
     private var faviconRequest: AnyCancellable?
@@ -151,4 +150,15 @@ class Tab: NSObject, SBRProcessBundleBridgeDelegate
                 .assign(to: \.favicon, on: self)
         }
     }
+    
+    private func updateMetadata() {
+        guard contentProcessTerminated == false else { return }
+        
+        _tabInfo = TabInfo(
+            title: loadedWebView?.title,
+            urlString: loadedWebView?.url?.absoluteString ?? self.homeURL?.absoluteString,
+            faviconData: self.favicon?.pngData(),
+            identifier: self.identifier
+        )
+    }
 }

App/Tabs/TabController.swift

@@ -33,6 +33,10 @@ class TabController
         tabs.first { $0.identifier == identifier }
     }
     
+    func tab(forWebView webView: WKWebView) -> Tab? {
+        tabs.first { $0.webView == webView }
+    }
+    
     func createNewTab(url: URL?) -> Tab {
         return self.createNewTab(url: url, webViewConfiguration: nil)
     }