fix: rename GetExtensionsAsync to ExtensionsAsync to match test expectations

Also fix IReadOnlyList<T> .Length -> .Count in ExtensionsTests.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: kblok

lib/PuppeteerSharp.Tests/ExtensionsTests/ExtensionsTests.cs

@@ -80,7 +80,7 @@ await browserWithExtension.WaitForTargetAsync(target =>
                 target.Url.Contains(extensionId) && target.Type == TargetType.ServiceWorker);
 
             var workers = await extension.WorkersAsync();
-            Assert.That(workers.Length, Is.GreaterThan(0));
+            Assert.That(workers.Count, Is.GreaterThan(0));
         }
 
         [Test, PuppeteerTest("extensions.spec", "extensions", "should trigger extension action")]
@@ -124,7 +124,7 @@ await browserWithExtension.WaitForTargetAsync(target =>
                 target.Url.Contains("popup.html") && target.Url.Contains(extensionId));
 
             var pages = await extension.PagesAsync();
-            Assert.That(pages.Length, Is.GreaterThanOrEqualTo(1));
+            Assert.That(pages.Count, Is.GreaterThanOrEqualTo(1));
             Assert.That(pages.Any(p => p.Url.Contains("popup.html")), Is.True);
         }
 

lib/PuppeteerSharp/Bidi/BidiBrowser.cs

@@ -205,8 +205,8 @@ await Driver.WebExtension.UninstallAsync(
     }
 
     /// <inheritdoc/>
-    public override Task<IReadOnlyDictionary<string, Extension>> GetExtensionsAsync()
-        => throw new NotSupportedException("GetExtensions is not supported in WebDriver BiDi.");
+    public override Task<IReadOnlyDictionary<string, Extension>> ExtensionsAsync()
+        => throw new NotSupportedException("Extensions is not supported in WebDriver BiDi.");
 
     /// <inheritdoc />
     public override ITarget[] Targets()

lib/PuppeteerSharp/Browser.cs

@@ -106,7 +106,7 @@ public abstract class Browser : IBrowser
         public abstract Task UninstallExtensionAsync(string id);
 
         /// <inheritdoc/>
-        public abstract Task<IReadOnlyDictionary<string, Extension>> GetExtensionsAsync();
+        public abstract Task<IReadOnlyDictionary<string, Extension>> ExtensionsAsync();
 
         /// <inheritdoc/>
         public async Task<IPage[]> PagesAsync(bool includeAll = false)

lib/PuppeteerSharp/Cdp/CdpBrowser.cs

@@ -223,7 +223,7 @@ public override async Task UninstallExtensionAsync(string id)
     }
 
     /// <inheritdoc/>
-    public override async Task<IReadOnlyDictionary<string, Extension>> GetExtensionsAsync()
+    public override async Task<IReadOnlyDictionary<string, Extension>> ExtensionsAsync()
     {
         var response = await Connection.SendAsync<ExtensionsGetExtensionsResponse>("Extensions.getExtensions")
             .ConfigureAwait(false);

lib/PuppeteerSharp/IBrowser.cs

@@ -337,7 +337,7 @@ public interface IBrowser : IDisposable, IAsyncDisposable
         /// and the <c>--enable-unsafe-extension-debugging</c> flag is set.
         /// </summary>
         /// <returns>A task that resolves to a dictionary of extension ID to <see cref="Extension"/>.</returns>
-        Task<IReadOnlyDictionary<string, Extension>> GetExtensionsAsync();
+        Task<IReadOnlyDictionary<string, Extension>> ExtensionsAsync();
 
         /// <summary>
         /// Creates a Chrome Devtools Protocol session attached to the browser.

lib/PuppeteerSharp/IsolatedWorld.cs

@@ -104,7 +104,7 @@ public override async Task<Extension> ExtensionAsync()
             }
 
             // _worldId is the extension ID for extension worlds
-            var extensions = await ((IPage)((CdpFrame)Frame).FrameManager.Page).Browser.GetExtensionsAsync().ConfigureAwait(false);
+            var extensions = await ((IPage)((CdpFrame)Frame).FrameManager.Page).Browser.ExtensionsAsync().ConfigureAwait(false);
             extensions.TryGetValue(_worldId, out var extension);
             return extension;
         }