TabView: Favicons in tab bar

App/Browser View/BrowserViewController.swift

@@ -35,6 +35,7 @@ class BrowserViewController: UIViewController, WKNavigationDelegate, WKUIDelegat
     private var backButtonObservation: NSKeyValueObservation?
     private var forwardButtonObservation: NSKeyValueObservation?
     private var activeTabObservation: AnyCancellable?
+    private var faviconObservation: AnyCancellable?
     
     private var loadError: Error?
     
@@ -276,12 +277,14 @@ class BrowserViewController: UIViewController, WKNavigationDelegate, WKUIDelegat
     }
     
     private func updateTitleAndURL(forWebView webView: WKWebView) {
-        browserView.titlebarView.setTitle(webView.title ?? "")
-        
-        if let urlString = webView.url?.absoluteString {
-            toolbarController.urlBar.textField.text = urlString
-        } else {
-            toolbarController.urlBar.textField.text = ""
+        if webView == browserView.webView {
+            browserView.titlebarView.setTitle(webView.title ?? "")
+            
+            if let urlString = webView.url?.absoluteString {
+                toolbarController.urlBar.textField.text = urlString
+            } else {
+                toolbarController.urlBar.textField.text = ""
+            }
         }
         
         // Figure out which tab this corresponds to
@@ -336,6 +339,12 @@ class BrowserViewController: UIViewController, WKNavigationDelegate, WKUIDelegat
             toolbarController.forwardButton.isEnabled = webView.canGoForward
         })
         
+        // Favicon observation
+        faviconObservation = tab.$favicon.receive(on: DispatchQueue.main)
+            .sink { [unowned self] _ in
+                updateTitleAndURL(forWebView: webView)
+            }
+        
         // Script blocker button
         updateScriptBlockerButton()