diff --git a/Sources/ContentView.swift b/Sources/ContentView.swift
index e9a7e04d..b5418cff 100644
--- a/Sources/ContentView.swift
+++ b/Sources/ContentView.swift
@@ -6016,6 +6016,8 @@ private struct TabItemView: View {
     @AppStorage("sidebarShowBranchDirectory") private var sidebarShowBranchDirectory = true
     @AppStorage("sidebarShowGitBranchIcon") private var sidebarShowGitBranchIcon = false
     @AppStorage("sidebarShowPullRequest") private var sidebarShowPullRequest = true
+    @AppStorage(BrowserLinkOpenSettings.openSidebarPullRequestLinksInCmuxBrowserKey)
+    private var openSidebarPullRequestLinksInCmuxBrowser = BrowserLinkOpenSettings.defaultOpenSidebarPullRequestLinksInCmuxBrowser
     @AppStorage("sidebarShowPorts") private var sidebarShowPorts = true
     @AppStorage("sidebarShowLog") private var sidebarShowLog = true
     @AppStorage("sidebarShowProgress") private var sidebarShowProgress = true
@@ -6322,8 +6324,7 @@ private struct TabItemView: View {
                 VStack(alignment: .leading, spacing: 1) {
                     ForEach(pullRequestDisplays) { pullRequest in
                         Button(action: {
-                            updateSelection()
-                            NSWorkspace.shared.open(pullRequest.url)
+                            openPullRequestLink(pullRequest.url)
                         }) {
                             HStack(spacing: 4) {
                                 PullRequestStatusIcon(
@@ -6939,6 +6940,17 @@ private struct TabItemView: View {
         isActive ? .white.opacity(0.75) : .secondary
     }
 
+    private func openPullRequestLink(_ url: URL) {
+        updateSelection()
+        if openSidebarPullRequestLinksInCmuxBrowser {
+            if tabManager.openBrowser(url: url, insertAtEnd: true) == nil {
+                NSWorkspace.shared.open(url)
+            }
+            return
+        }
+        NSWorkspace.shared.open(url)
+    }
+
     private func pullRequestStatusLabel(_ status: SidebarPullRequestStatus) -> String {
         switch status {
         case .open: return "open"
diff --git a/Sources/Panels/BrowserPanel.swift b/Sources/Panels/BrowserPanel.swift
index 71f297bb..07f1fd45 100644
--- a/Sources/Panels/BrowserPanel.swift
+++ b/Sources/Panels/BrowserPanel.swift
@@ -127,6 +127,9 @@ enum BrowserLinkOpenSettings {
     static let openTerminalLinksInCmuxBrowserKey = "browserOpenTerminalLinksInCmuxBrowser"
     static let defaultOpenTerminalLinksInCmuxBrowser: Bool = true
 
+    static let openSidebarPullRequestLinksInCmuxBrowserKey = "browserOpenSidebarPullRequestLinksInCmuxBrowser"
+    static let defaultOpenSidebarPullRequestLinksInCmuxBrowser: Bool = true
+
     static let interceptTerminalOpenCommandInCmuxBrowserKey = "browserInterceptTerminalOpenCommandInCmuxBrowser"
     static let defaultInterceptTerminalOpenCommandInCmuxBrowser: Bool = true
 
@@ -140,6 +143,13 @@ enum BrowserLinkOpenSettings {
         return defaults.bool(forKey: openTerminalLinksInCmuxBrowserKey)
     }
 
+    static func openSidebarPullRequestLinksInCmuxBrowser(defaults: UserDefaults = .standard) -> Bool {
+        if defaults.object(forKey: openSidebarPullRequestLinksInCmuxBrowserKey) == nil {
+            return defaultOpenSidebarPullRequestLinksInCmuxBrowser
+        }
+        return defaults.bool(forKey: openSidebarPullRequestLinksInCmuxBrowserKey)
+    }
+
     static func interceptTerminalOpenCommandInCmuxBrowser(defaults: UserDefaults = .standard) -> Bool {
         if defaults.object(forKey: interceptTerminalOpenCommandInCmuxBrowserKey) != nil {
             return defaults.bool(forKey: interceptTerminalOpenCommandInCmuxBrowserKey)
diff --git a/Sources/cmuxApp.swift b/Sources/cmuxApp.swift
index 0f193ba1..63dbc3b0 100644
--- a/Sources/cmuxApp.swift
+++ b/Sources/cmuxApp.swift
@@ -2631,6 +2631,8 @@ struct SettingsView: View {
     private var sidebarActiveTabIndicatorStyle = SidebarActiveTabIndicatorSettings.defaultStyle.rawValue
     @AppStorage("sidebarShowBranchDirectory") private var sidebarShowBranchDirectory = true
     @AppStorage("sidebarShowPullRequest") private var sidebarShowPullRequest = true
+    @AppStorage(BrowserLinkOpenSettings.openSidebarPullRequestLinksInCmuxBrowserKey)
+    private var openSidebarPullRequestLinksInCmuxBrowser = BrowserLinkOpenSettings.defaultOpenSidebarPullRequestLinksInCmuxBrowser
     @AppStorage("sidebarShowPorts") private var sidebarShowPorts = true
     @AppStorage("sidebarShowLog") private var sidebarShowLog = true
     @AppStorage("sidebarShowProgress") private var sidebarShowProgress = true
@@ -2877,6 +2879,19 @@ struct SettingsView: View {
 
                         SettingsCardDivider()
 
+                        SettingsCardRow(
+                            "Open Sidebar PR Links in cmux Browser",
+                            subtitle: openSidebarPullRequestLinksInCmuxBrowser
+                                ? "Clicks open inside cmux browser."
+                                : "Clicks open in your default browser."
+                        ) {
+                            Toggle("", isOn: $openSidebarPullRequestLinksInCmuxBrowser)
+                                .labelsHidden()
+                                .controlSize(.small)
+                        }
+
+                        SettingsCardDivider()
+
                         SettingsCardRow(
                             "Show Listening Ports in Sidebar",
                             subtitle: "Display detected listening ports for the active workspace."
@@ -3460,6 +3475,7 @@ struct SettingsView: View {
         sidebarActiveTabIndicatorStyle = SidebarActiveTabIndicatorSettings.defaultStyle.rawValue
         sidebarShowBranchDirectory = true
         sidebarShowPullRequest = true
+        openSidebarPullRequestLinksInCmuxBrowser = BrowserLinkOpenSettings.defaultOpenSidebarPullRequestLinksInCmuxBrowser
         sidebarShowPorts = true
         sidebarShowLog = true
         sidebarShowProgress = true
diff --git a/cmuxTests/CmuxWebViewKeyEquivalentTests.swift b/cmuxTests/CmuxWebViewKeyEquivalentTests.swift
index d84c20a6..59bcab74 100644
--- a/cmuxTests/CmuxWebViewKeyEquivalentTests.swift
+++ b/cmuxTests/CmuxWebViewKeyEquivalentTests.swift
@@ -6352,6 +6352,18 @@ final class BrowserLinkOpenSettingsTests: XCTestCase {
         XCTAssertTrue(BrowserLinkOpenSettings.openTerminalLinksInCmuxBrowser(defaults: defaults))
     }
 
+    func testSidebarPullRequestLinksDefaultToCmuxBrowser() {
+        XCTAssertTrue(BrowserLinkOpenSettings.openSidebarPullRequestLinksInCmuxBrowser(defaults: defaults))
+    }
+
+    func testSidebarPullRequestLinksPreferenceUsesStoredValue() {
+        defaults.set(false, forKey: BrowserLinkOpenSettings.openSidebarPullRequestLinksInCmuxBrowserKey)
+        XCTAssertFalse(BrowserLinkOpenSettings.openSidebarPullRequestLinksInCmuxBrowser(defaults: defaults))
+
+        defaults.set(true, forKey: BrowserLinkOpenSettings.openSidebarPullRequestLinksInCmuxBrowserKey)
+        XCTAssertTrue(BrowserLinkOpenSettings.openSidebarPullRequestLinksInCmuxBrowser(defaults: defaults))
+    }
+
     func testOpenCommandInterceptionDefaultsToCmuxBrowser() {
         XCTAssertTrue(BrowserLinkOpenSettings.interceptTerminalOpenCommandInCmuxBrowser(defaults: defaults))
     }