diff --git a/iBox/Sources/AppDelegate.swift b/iBox/Sources/AppDelegate.swift
index 8ba7e6f..eb8fbd4 100644
--- a/iBox/Sources/AppDelegate.swift
+++ b/iBox/Sources/AppDelegate.swift
@@ -21,7 +21,7 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
         }
 
         versioningHandler.checkAppVersion { result in
-            AppStateManager.shared.isVersionCheckCompleted = result
+            AppStateManager.shared.versionCheckCompleted = result
         }
         
         return true
diff --git a/iBox/Sources/BoxList/BoxListView.swift b/iBox/Sources/BoxList/BoxListView.swift
index 63e6d40..abbaba0 100644
--- a/iBox/Sources/BoxList/BoxListView.swift
+++ b/iBox/Sources/BoxList/BoxListView.swift
@@ -378,31 +378,40 @@ extension BoxListView: UITableViewDelegate {
     
     func tableView(_ tableView: UITableView, contextMenuConfigurationForRowAt indexPath: IndexPath, point: CGPoint) -> UIContextMenuConfiguration? {
         let configuration = UIContextMenuConfiguration(identifier: indexPath as NSIndexPath, previewProvider: { [weak self] () -> UIViewController? in
-            guard let self = self, let cellViewModel = self.viewModel?.boxList[indexPath.section].boxListCellViewModelsWithStatus[indexPath.row] else { return nil }
-            
-            let id = cellViewModel.id
-            let url = cellViewModel.url
-            let name = cellViewModel.name
-            
-            let previewViewController: UIViewController
-            
-            if let cachedViewController = WebCacheManager.shared.viewControllerForKey(id) {
-                previewViewController = cachedViewController
-            } else {
-                let viewController = WebViewController()
-                viewController.selectedWebsite = url
-                viewController.title = name
-                WebCacheManager.shared.cacheData(forKey: id, viewController: viewController)
-                previewViewController = viewController
-            }
-            
-            return previewViewController
+            guard let self = self else { return nil }
+            return self.createOrRetrievePreviewController(for: indexPath)
         }, actionProvider: { suggestedActions in
             return self.makeContextMenu(for: indexPath)
         })
         return configuration
     }
     
+    private func createOrRetrievePreviewController(for indexPath: IndexPath) -> UIViewController? {
+        guard let cellViewModel = self.viewModel?.boxList[indexPath.section].boxListCellViewModelsWithStatus[indexPath.row] else { return nil }
+        let id = cellViewModel.id
+        let cachedViewController = WebCacheManager.shared.viewControllerForKey(id)
+
+        if let cachedViewController = cachedViewController, cachedViewController.errorViewController?.isHandlingError == nil {
+            return cachedViewController
+        }
+
+        if cachedViewController?.errorViewController?.isHandlingError ?? false {
+            WebCacheManager.shared.removeViewControllerForKey(id)
+        }
+
+        let newViewController = createWebViewController(with: cellViewModel)
+        WebCacheManager.shared.cacheData(forKey: id, viewController: newViewController)
+        return newViewController
+    }
+
+    private func createWebViewController(with viewModel: BoxListCellViewModel) -> WebViewController {
+        let viewController = WebViewController()
+        viewController.selectedWebsite = viewModel.url
+        viewController.title = viewModel.name
+        viewController.id = viewModel.id
+        return viewController
+    }
+    
     func tableView(_ tableView: UITableView, previewForDismissingContextMenuWithConfiguration configuration: UIContextMenuConfiguration) -> UITargetedPreview? {
         guard let indexPath = configuration.identifier as? IndexPath, let cell = tableView.cellForRow(at: indexPath) else {
                     return nil
diff --git a/iBox/Sources/BoxList/BoxListViewController.swift b/iBox/Sources/BoxList/BoxListViewController.swift
index 87ba714..120d6d6 100644
--- a/iBox/Sources/BoxList/BoxListViewController.swift
+++ b/iBox/Sources/BoxList/BoxListViewController.swift
@@ -43,6 +43,19 @@ class BoxListViewController: BaseViewController<BoxListView>, BaseViewController
         contentView.viewModel?.input.send(.viewWillAppear)
     }
     
+    override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
+        super.viewWillTransition(to: size, with: coordinator)
+        coordinator.animate(alongsideTransition: nil) { _ in
+            self.dismissPreviewIfNeeded()
+        }
+    }
+    
+    func dismissPreviewIfNeeded() {
+        if let previewVC = self.presentedViewController as? WebViewController {
+            previewVC.dismiss(animated: true, completion: nil)
+        }
+    }
+    
     // MARK: - BaseViewControllerProtocol
     
     func setupNavigationBar() {
@@ -205,20 +218,33 @@ extension BoxListViewController: BoxListViewDelegate {
         self.present(controller, animated: true)
     }
     
-    
     func didSelectWeb(id: UUID, at url: URL, withName name: String) {
-        if let cachedViewController = WebCacheManager.shared.viewControllerForKey(id) {
-            // 이미 캐시에 존재한다면, 그 인스턴스를 재사용
-            navigationController?.pushViewController(cachedViewController, animated: true)
-        } else {
-            // 캐시에 없는 경우, 새로운 viewController 인스턴스를 생성하고 캐시에 추가합니다.
-            let viewController = WebViewController()
-            viewController.delegate = self
-            viewController.selectedWebsite = url
-            viewController.title = name
-            WebCacheManager.shared.cacheData(forKey: id, viewController: viewController)
-            navigationController?.pushViewController(viewController, animated: true)
+        let viewController = getOrCreateWebViewController(id: id, url: url, name: name)
+        navigationController?.pushViewController(viewController, animated: true)
+    }
+    
+    private func getOrCreateWebViewController(id: UUID, url: URL, name: String) -> WebViewController {
+        let cachedViewController = WebCacheManager.shared.viewControllerForKey(id)
+        
+        if let cachedViewController = cachedViewController, cachedViewController.errorViewController?.isHandlingError == nil {
+            return cachedViewController
+        }
+        
+        if cachedViewController?.errorViewController?.isHandlingError ?? false {
+            WebCacheManager.shared.removeViewControllerForKey(id)
         }
+        
+        return createAndCacheWebViewController(id: id, url: url, name: name)
+    }
+    
+    private func createAndCacheWebViewController(id: UUID, url: URL, name: String) -> WebViewController {
+        let viewController = WebViewController()
+        viewController.delegate = self
+        viewController.selectedWebsite = url
+        viewController.title = name
+        viewController.id = id
+        WebCacheManager.shared.cacheData(forKey: id, viewController: viewController)
+        return viewController
     }
     
     func pushViewController(type: EditType) {
diff --git a/iBox/Sources/CustomLaunchScreen/CustomLaunchScreenView.swift b/iBox/Sources/CustomLaunchScreen/CustomLaunchScreenView.swift
index d1d0202..92876d2 100644
--- a/iBox/Sources/CustomLaunchScreen/CustomLaunchScreenView.swift
+++ b/iBox/Sources/CustomLaunchScreen/CustomLaunchScreenView.swift
@@ -63,7 +63,7 @@ class CustomLaunchScreenView: UIView {
         timer = Timer.scheduledTimer(withTimeInterval: 0.2, repeats: true) { [weak self] timer in
             guard let self = self else { return }
             
-            let state = AppStateManager.shared.isVersionCheckCompleted
+            let state = AppStateManager.shared.versionCheckCompleted
             if state == .success || state == .later || state == .maxRetryReached {
                 timer.invalidate()
                 self.timer = nil
diff --git a/iBox/Sources/CustomLaunchScreen/CustomLaunchScreenViewController.swift b/iBox/Sources/CustomLaunchScreen/CustomLaunchScreenViewController.swift
index 9251691..1c63d5b 100644
--- a/iBox/Sources/CustomLaunchScreen/CustomLaunchScreenViewController.swift
+++ b/iBox/Sources/CustomLaunchScreen/CustomLaunchScreenViewController.swift
@@ -38,7 +38,7 @@ class CustomLaunchScreenViewController: UIViewController {
     
     // MARK: - Custom Update Checker View (예정)
     private func observeVersionCheckCompletion() {
-        AppStateManager.shared.$isVersionCheckCompleted
+        AppStateManager.shared.$versionCheckCompleted
             .receive(on: DispatchQueue.main)
             .sink { [weak self] result in
                 switch result {
diff --git a/iBox/Sources/Error/ErrorCode.swift b/iBox/Sources/Error/ErrorCode.swift
new file mode 100644
index 0000000..65a90fe
--- /dev/null
+++ b/iBox/Sources/Error/ErrorCode.swift
@@ -0,0 +1,18 @@
+//
+//  ErrorCode.swift
+//  iBox
+//
+//  Created by Chan on 4/23/24.
+//
+
+import Foundation
+
+enum ViewErrorCode: Equatable {
+    case normal
+    case unknown
+    case webContentProcessTerminated
+    case webViewInvalidated
+    case javaScriptExceptionOccurred
+    case javaScriptResultTypeIsUnsupported
+    case networkError(URLError)
+}
diff --git a/iBox/Sources/Error/ErrorPageView.swift b/iBox/Sources/Error/ErrorPageView.swift
index bfa39bd..1338548 100644
--- a/iBox/Sources/Error/ErrorPageView.swift
+++ b/iBox/Sources/Error/ErrorPageView.swift
@@ -12,38 +12,89 @@ import SnapKit
 class ErrorPageView: UIView {
     private var imageViews: [UIImageView] = []
     private let images = ["fox_page0", "fox_page1", "fox_page2", "fox_page3", "fox_page4"]
-    private var timer: Timer?
+    var timer: Timer?
     
-    let messageLabel = UILabel()
+    private let backPannelView = UIView().then {
+        $0.backgroundColor = .backgroundColor
+    }
+    
+    private let messageLabel = UILabel().then {
+        $0.textAlignment = .center
+        $0.numberOfLines = 0
+        $0.lineBreakMode = .byTruncatingTail
+    }
+    
+    private let problemLabel = UILabel().then {
+        $0.textAlignment = .center
+        $0.numberOfLines = 0
+        $0.text = "해당 주소에서 문제가 발생했습니다."
+    }
+    
+    let backButton = UIButton().then {
+        $0.setTitle("나가기", for: .normal)
+        $0.backgroundColor = .box2
+        $0.setTitleColor(.white, for: .normal)
+        $0.layer.cornerRadius = 10
+        $0.addAnimationForStateChange(from: .box, to: .box2)
+    }
+    
+    let retryButton = UIButton().then {
+        $0.setTitle("새로고침", for: .normal)
+        $0.backgroundColor = .systemGray
+        $0.setTitleColor(.white, for: .normal)
+        $0.layer.cornerRadius = 10
+        $0.addAnimationForStateChange(from: .box, to: .systemGray)
+    }
+    
+    let closeButton = UIButton().then {
+        $0.setTitle("닫기", for: .normal)
+        $0.backgroundColor = .systemGray
+        $0.setTitleColor(.white, for: .normal)
+        $0.layer.cornerRadius = 10
+        $0.addAnimationForStateChange(from: .box, to: .systemGray)
+    }
     
-    let backButton = UIButton()
-    let retryButton = UIButton()
-
     override init(frame: CGRect) {
         super.init(frame: frame)
-        setupViews()
+        setupProperty()
+        setupHierarchy()
+        setupAnimation()
         setupLayout()
         changeImages()
     }
     
+    override func willMove(toSuperview newSuperview: UIView?) {
+        super.willMove(toSuperview: newSuperview)
+        
+        if newSuperview == nil {
+            timer?.invalidate()
+            timer = nil
+        }
+    }
+    
     required init?(coder: NSCoder) {
         fatalError("init(coder:) has not been implemented")
     }
     
-    private func setupViews() {
-        backgroundColor = .clear
-        
-        messageLabel.textAlignment = .center
-        messageLabel.numberOfLines = 0
-        
-        retryButton.setTitle("무시하기", for: .normal)
-        retryButton.backgroundColor = .systemBlue
-        retryButton.setTitleColor(.white, for: .normal)
-        retryButton.layer.cornerRadius = 10
-        
-        addSubview(messageLabel)
-        addSubview(retryButton)
-        
+    override func layoutSubviews() {
+        super.layoutSubviews()
+        backPannelView.roundCorners([.bottomLeft, .bottomRight], radius: 20)
+    }
+    
+    private func setupProperty() {
+        changeImages()
+    }
+    
+    private func setupHierarchy() {
+        addSubview(backPannelView)
+        backPannelView.addSubview(retryButton)
+        backPannelView.addSubview(closeButton)
+        backPannelView.addSubview(backButton)
+        backPannelView.addSubview(problemLabel)
+        backPannelView.addSubview(messageLabel)
+    }
+    
+    private func setupAnimation() {
         for imageName in images {
             let imageView = UIImageView(image: UIImage(named: imageName))
             imageView.contentMode = .scaleAspectFit
@@ -52,40 +103,64 @@ class ErrorPageView: UIView {
             addSubview(imageView)
             imageViews.append(imageView)
         }
-        
-        changeImages()
-        
     }
     
     private func setupLayout() {
         
-        imageViews.forEach { imageView in
-            imageView.snp.makeConstraints { make in
-                make.centerX.equalToSuperview()
-                make.centerY.equalToSuperview()
-                make.leading.greaterThanOrEqualToSuperview().offset(20)
-                make.trailing.lessThanOrEqualToSuperview().offset(-20)
-                make.width.height.equalTo(32)
-            }
+        backPannelView.snp.makeConstraints { make in
+            make.top.equalToSuperview()
+            make.trailing.leading.equalToSuperview().inset(20)
+            make.height.equalToSuperview().multipliedBy(0.5)
         }
         
-        messageLabel.snp.makeConstraints { make in
-            make.top.equalTo(imageViews[0].snp.bottom).offset(20)
+        retryButton.snp.makeConstraints { make in
+            make.bottom.equalToSuperview().inset(10)
             make.centerX.equalToSuperview()
-            make.leading.greaterThanOrEqualToSuperview().offset(20)
-            make.trailing.lessThanOrEqualToSuperview().offset(-20)
+            make.width.equalTo(100)
+            make.height.equalTo(44)
         }
         
-        retryButton.snp.makeConstraints { make in
-            make.top.equalTo(messageLabel.snp.bottom).offset(20)
-            make.centerX.equalToSuperview()
+        closeButton.snp.makeConstraints { make in
+            make.leading.equalTo(retryButton.snp.trailing).offset(20)
+            make.centerY.equalTo(retryButton.snp.centerY)
             make.width.equalTo(100)
             make.height.equalTo(44)
         }
+        
+        backButton.snp.makeConstraints { make in
+            make.trailing.equalTo(retryButton.snp.leading).offset(-20)
+            make.centerY.equalTo(retryButton.snp.centerY)
+            make.width.equalTo(100)
+            make.height.equalTo(44)
+        }
+        
+        problemLabel.snp.makeConstraints { make in
+            make.bottom.equalTo(retryButton.snp.top).offset(-10)
+            make.leading.equalToSuperview().offset(20)
+            make.trailing.equalToSuperview().offset(-20)
+        }
+        
+        messageLabel.snp.makeConstraints { make in
+            make.centerX.equalToSuperview()
+            make.bottom.equalTo(problemLabel.snp.top).offset(-10)
+            make.leading.equalToSuperview().offset(20)
+            make.trailing.equalToSuperview().offset(-20)
+        }
+        
+        imageViews.forEach { imageView in
+            imageView.snp.makeConstraints { make in
+                make.centerX.equalToSuperview()
+                make.top.equalTo(safeAreaLayoutGuide).offset(10)
+                make.bottom.equalTo(messageLabel.snp.top).offset(-10)
+                make.leading.greaterThanOrEqualToSuperview().offset(20)
+                make.trailing.lessThanOrEqualToSuperview().offset(-20)
+                make.width.height.equalTo(32)
+            }
+        }
     }
     
     func configure(with error: Error, url: String) {
-        messageLabel.text = "\(url): \n해당 주소를 불러오는데 실패했어요!"
+        messageLabel.text = "\(url)"
         print(error.localizedDescription)
     }
     
@@ -93,12 +168,14 @@ class ErrorPageView: UIView {
         var currentIndex = 0
         
         timer = Timer.scheduledTimer(withTimeInterval: 0.2, repeats: true) { [weak self] timer in
-            guard let self = self else { return }
-            
-            let state = AppStateManager.shared.isVersionCheckCompleted
-            if state == .success || state == .later || state == .maxRetryReached {
+            guard let self = self else {
                 timer.invalidate()
-                self.timer = nil
+                return
+            }
+            
+            let state = AppStateManager.shared.currentViewErrorState
+            
+            if state == .normal {
                 return
             }
             
diff --git a/iBox/Sources/Error/ErrorPageViewController.swift b/iBox/Sources/Error/ErrorPageViewController.swift
index 04837c5..0cc570e 100644
--- a/iBox/Sources/Error/ErrorPageViewController.swift
+++ b/iBox/Sources/Error/ErrorPageViewController.swift
@@ -10,6 +10,7 @@ import WebKit
 
 protocol ErrorPageControllerDelegate: AnyObject {
     func presentErrorPage(_ errorPage: ErrorPageViewController)
+    func backButton()
 }
 
 protocol WebViewErrorDelegate {
@@ -19,7 +20,10 @@ protocol WebViewErrorDelegate {
 class ErrorPageViewController: UIViewController {
     weak var delegate: ErrorPageControllerDelegate?
     var webView: WebView?
-
+    var isHandlingError = false
+    
+    let slideInPresentationManager = SlideInPresentationManager()
+    
     init(webView: WebView) {
         super.init(nibName: nil, bundle: nil)
         self.webView = webView
@@ -35,11 +39,27 @@ class ErrorPageViewController: UIViewController {
     
     override func viewDidLoad() {
         super.viewDidLoad()
+        setupProperty()
+        setupPresentation()
+    }
+    
+    override func viewWillDisappear(_ animated: Bool) {
+        resetErrorHandling()
+    }
+    
+    private func setupProperty() {
         if let errorPageView = view as? ErrorPageView {
             errorPageView.retryButton.addTarget(self, action: #selector(retryButtonTapped), for: .touchUpInside)
+            errorPageView.closeButton.addTarget(self, action: #selector(closeButtonTapped), for: .touchUpInside)
+            errorPageView.backButton.addTarget(self, action: #selector(backButtonTapped), for: .touchUpInside)
         }
     }
     
+    func setupPresentation() {
+        self.modalPresentationStyle = .custom
+        self.transitioningDelegate = slideInPresentationManager
+    }
+    
     func configureWithError(_ error: Error, url: String) {
         if let errorPageView = view as? ErrorPageView {
             errorPageView.configure(with: error, url: url)
@@ -48,20 +68,87 @@ class ErrorPageViewController: UIViewController {
     
     @objc private func retryButtonTapped() {
         webView?.retryLoading()
+    }
+    
+    @objc private func closeButtonTapped() {
         dismiss(animated: true)
     }
     
+    @objc func backButtonTapped() {
+        self.dismiss(animated: true) {
+            self.delegate?.backButton()
+        }
+    }
+
     func handleError(_ error: Error, _ url: URL?) {
-        self.modalPresentationStyle = .overFullScreen
-        self.configureWithError(error, url: url?.absoluteString ?? "")
-        delegate?.presentErrorPage(self)
+        guard !isHandlingError else { return }
+        isHandlingError = true
+        
+        if presentedViewController != nil {
+            dismiss(animated: true) {
+                self.configureWithError(error, url: url?.absoluteString ?? "")
+                self.delegate?.presentErrorPage(self)
+            }
+        } else {
+            configureWithError(error, url: url?.absoluteString ?? "")
+            delegate?.presentErrorPage(self)
+        }
+    }
+
+    func resetErrorHandling() {
+        isHandlingError = false
+    }
+    
+    private func convertErrorToViewErrorCode(_ error: Error) -> ViewErrorCode {
+        if let wkError = error as? WKError {
+            switch wkError.code {
+            case .webContentProcessTerminated:
+                return .webContentProcessTerminated
+            case .webViewInvalidated:
+                return .webViewInvalidated
+            case .javaScriptExceptionOccurred:
+                return .javaScriptExceptionOccurred
+            case .javaScriptResultTypeIsUnsupported:
+                return .javaScriptResultTypeIsUnsupported
+            default:
+                return .unknown
+            }
+        } else if let urlError = error as? URLError {
+            return .networkError(urlError)
+        }
+        
+        return .unknown
+    }
+    
+    private func handleViewError(_ error: ViewErrorCode) {
+        switch error {
+        case .normal:
+            print("OK.")
+        case .unknown:
+            print("Unknown error occurred in the view.")
+        case .webContentProcessTerminated:
+            print("Web content process has been terminated unexpectedly.")
+        case .webViewInvalidated:
+            print("The web view has been invalidated.")
+        case .javaScriptExceptionOccurred:
+            print("A JavaScript exception occurred.")
+        case .javaScriptResultTypeIsUnsupported:
+            print("JavaScript returned a result type that is not supported.")
+        case .networkError(let urlError):
+            print("Network error occurred: \(urlError.localizedDescription)")
+        }
+        
+        AppStateManager.shared.updateViewError(error)
     }
 }
 
 extension ErrorPageViewController: WebViewErrorDelegate {
     
     func webView(_ webView: WebView, didFailWithError error: Error, url: URL?) {
-        handleError(error, url)
+            handleError(error, url)
+        
+        let viewErrorCode = convertErrorToViewErrorCode(error)
+        handleViewError(viewErrorCode)
     }
     
 }
diff --git a/iBox/Sources/Extension/UIButton+Extension.swift b/iBox/Sources/Extension/UIButton+Extension.swift
new file mode 100644
index 0000000..16dee87
--- /dev/null
+++ b/iBox/Sources/Extension/UIButton+Extension.swift
@@ -0,0 +1,55 @@
+//
+//  UIButton+Extension.swift
+//  iBox
+//
+//  Created by Chan on 4/25/24.
+//
+
+import UIKit
+import ObjectiveC
+
+private var touchDownColorKey: UInt8 = 0
+private var touchUpColorKey: UInt8 = 0
+
+extension UIButton {
+    var touchDownColor: UIColor? {
+        get {
+            return objc_getAssociatedObject(self, &touchDownColorKey) as? UIColor
+        }
+        set {
+            objc_setAssociatedObject(self, &touchDownColorKey, newValue, .OBJC_ASSOCIATION_RETAIN_NONATOMIC)
+        }
+    }
+
+    var touchUpColor: UIColor? {
+        get {
+            return objc_getAssociatedObject(self, &touchUpColorKey) as? UIColor
+        }
+        set {
+            objc_setAssociatedObject(self, &touchUpColorKey, newValue, .OBJC_ASSOCIATION_RETAIN_NONATOMIC)
+        }
+    }
+
+    func addAnimationForStateChange(from: UIColor, to: UIColor) {
+        self.touchDownColor = from
+        self.touchUpColor = to
+        addTarget(self, action: #selector(animateOnTouchDown), for: .touchDown)
+        addTarget(self, action: #selector(animateOnTouchUp), for: [.touchUpInside, .touchUpOutside, .touchCancel])
+    }
+
+    @objc private func animateOnTouchDown() {
+        if let color = touchDownColor {
+            UIView.animate(withDuration: 0.3) {
+                self.backgroundColor = color
+            }
+        }
+    }
+
+    @objc private func animateOnTouchUp() {
+        if let color = touchUpColor {
+            UIView.animate(withDuration: 0.3) {
+                self.backgroundColor = color
+            }
+        }
+    }
+}
diff --git a/iBox/Sources/Extension/UIColor+Extension.swift b/iBox/Sources/Extension/UIColor+Extension.swift
index f4c0fc4..2a5fc3f 100644
--- a/iBox/Sources/Extension/UIColor+Extension.swift
+++ b/iBox/Sources/Extension/UIColor+Extension.swift
@@ -32,6 +32,8 @@ extension UIColor {
     static let box = UIColor(hex: 0xFF7F29)
     static let box2 = UIColor(hex: 0xFF9548)
     static let box3 = UIColor(hex: 0xFFDC6E)
+    static let boxWithOpacity = UIColor(hex: 0xFF7F29, alpha: 0.7)
+    static let box2WithOpacity = UIColor(hex: 0xFF9548, alpha: 0.7)
     static let tableViewBackgroundColor = color(light: .systemGroupedBackground, dark: .systemGray4)
     static let folderGray = color(light: .systemGray3, dark: .systemGray2)
     static let webIconColor = color(light: .black, dark: .systemGray)
diff --git a/iBox/Sources/Extension/UIView+Extension.swift b/iBox/Sources/Extension/UIView+Extension.swift
index 890082d..e7f584c 100644
--- a/iBox/Sources/Extension/UIView+Extension.swift
+++ b/iBox/Sources/Extension/UIView+Extension.swift
@@ -30,6 +30,16 @@ extension UIView {
         }
     }
     
+    func roundCorners(_ corners: UIRectCorner, radius: CGFloat) {
+        DispatchQueue.main.async { // 확실히 메인 스레드에서 실행되도록 강제
+            let path = UIBezierPath(roundedRect: self.bounds, byRoundingCorners: corners, cornerRadii: CGSize(width: radius, height: radius))
+            let mask = CAShapeLayer()
+            mask.path = path.cgPath
+            mask.frame = self.bounds
+            self.layer.mask = mask
+        }
+    }
+    
     // MARK: - 뷰 계층 구조 log
     func printViewHierarchy(level: Int = 0) {
         let padding = String(repeating: " ", count: level * 2)
@@ -40,4 +50,5 @@ extension UIView {
             subview.printViewHierarchy(level: level + 1)
         }
     }
+    
 }
diff --git a/iBox/Sources/Settings/Reset/ResetSuccessView.swift b/iBox/Sources/Settings/Reset/ResetSuccessView.swift
index a52388b..c72685d 100644
--- a/iBox/Sources/Settings/Reset/ResetSuccessView.swift
+++ b/iBox/Sources/Settings/Reset/ResetSuccessView.swift
@@ -75,6 +75,7 @@ class ResetSuccessView: UIView {
             make.width.height.equalTo(50)
         }
     }
+    
     private func animateView() {
         UIView.animate(withDuration: 0.5, animations: {
             self.alpha = 1.0
diff --git a/iBox/Sources/Shared/Animator/FullSizePresentationController.swift b/iBox/Sources/Shared/Animator/FullSizePresentationController.swift
new file mode 100644
index 0000000..8693cab
--- /dev/null
+++ b/iBox/Sources/Shared/Animator/FullSizePresentationController.swift
@@ -0,0 +1,37 @@
+//
+//  FullSizePresentationController.swift
+//  iBox
+//
+//  Created by Chan on 4/24/24.
+//
+
+import UIKit
+
+class FullSizePresentationController: UIPresentationController {
+    private var dimmingView: UIView!
+    
+    override func containerViewDidLayoutSubviews() {
+        super.containerViewDidLayoutSubviews()
+        
+        dimmingView.frame = containerView?.bounds ?? CGRect.zero
+        presentedView?.frame = frameOfPresentedViewInContainerView
+    }
+    
+    override func presentationTransitionWillBegin() {
+        guard let containerView = containerView else { return }
+        
+        dimmingView = UIView(frame: containerView.bounds)
+        dimmingView.backgroundColor = UIColor(white: 0.0, alpha: 0.4)
+        dimmingView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
+        
+        containerView.addSubview(dimmingView)
+        containerView.sendSubviewToBack(dimmingView)
+        
+        super.presentationTransitionWillBegin()
+    }
+    
+    override var frameOfPresentedViewInContainerView: CGRect {
+        guard let containerView = containerView else { return .zero }
+        return CGRect(x: 0, y: 0, width: containerView.bounds.width, height: containerView.bounds.height)
+    }
+}
diff --git a/iBox/Sources/Shared/Animator/SlideInPresentationAnimator.swift b/iBox/Sources/Shared/Animator/SlideInPresentationAnimator.swift
new file mode 100644
index 0000000..f003178
--- /dev/null
+++ b/iBox/Sources/Shared/Animator/SlideInPresentationAnimator.swift
@@ -0,0 +1,46 @@
+//
+//  SlideInPresentationAnimator.swift
+//  iBox
+//
+//  Created by Chan on 4/24/24.
+//
+
+import UIKit
+
+class SlideInPresentationAnimator: NSObject, UIViewControllerAnimatedTransitioning {
+    let isPresentation: Bool
+    
+    init(isPresentation: Bool) {
+        self.isPresentation = isPresentation
+        super.init()
+    }
+    
+    func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
+        return 0.3
+    }
+    
+    func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
+        let key = isPresentation ? UITransitionContextViewControllerKey.to : UITransitionContextViewControllerKey.from
+        guard let controller = transitionContext.viewController(forKey: key) else { return }
+        
+        if isPresentation {
+            transitionContext.containerView.addSubview(controller.view)
+        }
+        
+        let presentedFrame = transitionContext.finalFrame(for: controller)
+        var dismissedFrame = presentedFrame
+        dismissedFrame.origin.y = -presentedFrame.height
+        
+        let initialFrame = isPresentation ? dismissedFrame : presentedFrame
+        let finalFrame = isPresentation ? presentedFrame : dismissedFrame
+        
+        controller.view.frame = initialFrame
+        UIView.animate(
+            withDuration: transitionDuration(using: transitionContext),
+            animations: {
+                controller.view.frame = finalFrame
+            }, completion: { finished in
+                transitionContext.completeTransition(finished)
+            })
+    }
+}
diff --git a/iBox/Sources/Shared/AppStateManager.swift b/iBox/Sources/Shared/AppStateManager.swift
index 3c32cda..10f8b22 100644
--- a/iBox/Sources/Shared/AppStateManager.swift
+++ b/iBox/Sources/Shared/AppStateManager.swift
@@ -10,6 +10,10 @@ import Combine
 class AppStateManager {
     static let shared = AppStateManager()
     
-    @Published var isVersionCheckCompleted: VersionCheckCode = .initial
-    
+    @Published var versionCheckCompleted: VersionCheckCode = .initial
+    var currentViewErrorState: ViewErrorCode = .normal
+
+    func updateViewError(_ error: ViewErrorCode) {
+        currentViewErrorState = error
+    }
 }
diff --git a/iBox/Sources/Shared/SlideInPresentationManager.swift b/iBox/Sources/Shared/SlideInPresentationManager.swift
new file mode 100644
index 0000000..6e51d0f
--- /dev/null
+++ b/iBox/Sources/Shared/SlideInPresentationManager.swift
@@ -0,0 +1,22 @@
+//
+//  SlideInPresentationManager.swift
+//  iBox
+//
+//  Created by Chan on 4/23/24.
+//
+
+import UIKit
+
+class SlideInPresentationManager: NSObject, UIViewControllerTransitioningDelegate {
+    func presentationController(forPresented presented: UIViewController, presenting: UIViewController?, source: UIViewController) -> UIPresentationController? {
+        return FullSizePresentationController(presentedViewController: presented, presenting: presenting)
+    }
+
+    func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
+        return SlideInPresentationAnimator(isPresentation: true)
+    }
+
+    func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
+        return SlideInPresentationAnimator(isPresentation: false)
+    }
+}
diff --git a/iBox/Sources/Web/WebViewController.swift b/iBox/Sources/Web/WebViewController.swift
index c67e266..b872a1a 100644
--- a/iBox/Sources/Web/WebViewController.swift
+++ b/iBox/Sources/Web/WebViewController.swift
@@ -13,7 +13,8 @@ protocol WebViewDelegate {
 }
 
 class WebViewController: BaseViewController<WebView>, BaseViewControllerProtocol {
-    
+    var id: UUID?
+    var slideInPresentationManager = SlideInPresentationManager()
     var errorViewController: ErrorPageViewController?
     var delegate: AddBookmarkViewControllerProtocol?
     var selectedWebsite: URL?
@@ -34,6 +35,21 @@ class WebViewController: BaseViewController<WebView>, BaseViewControllerProtocol
         contentView.setupRefreshControl()
     }
     
+    override func viewWillDisappear(_ animated: Bool) {
+        super.viewWillDisappear(animated)
+        
+        if ((isMovingFromParent || isBeingDismissed) && AppStateManager.shared.currentViewErrorState != .normal){
+            if let id = self.id {
+                WebCacheManager.shared.removeViewControllerForKey(id)
+            }
+        }
+    }
+    
+    deinit {
+        AppStateManager.shared.currentViewErrorState = .normal
+        errorViewController = nil
+    }
+    
     // MARK: - BaseViewControllerProtocol
     
     func setupNavigationBar() {
@@ -72,4 +88,12 @@ extension WebViewController: ErrorPageControllerDelegate {
     func presentErrorPage(_ errorPage: ErrorPageViewController) {
         self.present(errorPage, animated: true, completion: nil)
     }
+    
+    func backButton() {
+        if let navController = navigationController {
+            navController.popViewController(animated: true)
+        } else {
+            dismiss(animated: true)
+        }
+    }
 }