Chromium Embedded Framework (CEF) #

ExeOutput for PHP includes the Chromium Embedded Framework (CEF), an open-source project that brings the power of the Chromium browser engine directly into your applications. This allows you to build rich user interfaces with HTML, CSS, and JavaScript.

👉 In ExeOutput for PHP, you can choose Latest CEF here:
Application Settings → Rendering Engine.

Overview #

CEF is a good choice if your application requires:

• Self-contained distribution: CEF is bundled inside your application. No external runtime (like WebView2) is needed.
• Fine-grained customization: ExeOutput exposes a wide range of properties to control caching, rendering, JavaScript behavior, and more.
• Stable, well-tested technology: CEF is cross-platform and widely used, making it reliable for embedded browsers.

CEF Properties #

In ExeOutput for PHP, you can configure many Chromium options under
Application Settings → Rendering Engine → Latest CEF (Chromium).

AdditionalChromiumArgs #

Add custom command-line arguments for Chromium.
Example:

--disable-accelerated-video

Use spaces to separate multiple arguments.

AllowOutdatedPlugins #

Disables the Chromium security feature that blocks outdated plugins.

ApplicationCache #

Controls whether the Application Cache can be used (STATE_ENABLED, STATE_DISABLED).

AutoOpenExtensions #

Lets compiled files open in their native applications when accessed by users.

• Extensions must be listed, separated by semicolons (e.g., .docx;.xlsx).
• Files are extracted temporarily to disk (potential security risk).
• Ignored for PDF if the built-in PDF Viewer is enabled, and for DOCX if the built-in Word Viewer is enabled.

BackgroundColor #

Sets the browser background color before content loads.
Only the RGB components are used.

CaretBrowsing #

Controls whether the caret (text cursor) is displayed and can be used for navigation.

Custom404Error #

Displays the custom 404 error page defined in Dialog Boxes.

• True: Returns 200 OK with your custom error page.
• False: Returns standard 404 Not Found.

CustomUserAgent #

Defines a custom User-Agent string.

Databases #

Enables or disables the use of web databases.

DefLocale #

Sets the Chromium locale (e.g., fr, en-US).
Locales are in the CEFRuntime\locales folder.

DeveloperTools #

Enables/disables Chromium DevTools. End users can open them via the browser’s context menu.

DevToolsPopup / DevToolsPort #

• DevToolsPopup: Allows DevTools in a separate popup window.
• DevToolsPort: Sets the port for remote debugging (e.g., 9000). Open http://localhost:9000 in Chrome/Edge.

DisableAccelerated2DCanvas #

Disables GPU acceleration for 2D canvas rendering.

DisableAlertDialogWorkaround #

Disables the workaround that prevents status bar flicker with JavaScript dialogs.

DisableBuiltInKeyHandling #

Disables built-in Chromium key handling. Can be useful for full control of keyboard input.

DisableDragDrop #

Blocks drag-and-drop of resources.

DisableFindText #

Disables the “Find Text” command.

DisableImgDragDrop #

Prevents images from being dragged out of the browser (avoiding leaks of embedded images).

DisableLocalCache #

Controls whether caching and temporary files are allowed.
By default, they are stored in the User Data directory.

DisableSafeBrowsing #

Turns off Google Safe Browsing.

DoNotTrack #

Enables or disables the “Do Not Track” feature.

EnableGPUPlugin #

Controls GPU-related plugins. Should normally stay disabled.

EnableMediaStream #

Enables WebRTC (audio/video streaming).

EnableSpeechInput #

Controls whether the Speech Input API is allowed.

FileAccessFromFileUrls #

Controls whether local file URLs can access other file URLs.

ForbidDownloadMimeType #

Blocks downloading of specific MIME types (still playable). Example:

application/pdf;audio/mp3;audio/ogg;video/mp4

ImageLoading #

Allows or blocks image loading.

ImageShrinkStandaloneToFit #

Defines how standalone images are resized to fit the window.

Javascript #

Controls whether JavaScript execution is allowed.

JavascriptAccessClipboard #

Enables scripts to access the clipboard.

JavascriptCloseWindows #

Allows or blocks window.close() in scripts.

JavascriptDomPaste #

Allows pasting DOM content via JavaScript.

JavascriptOpenWindows #

Controls whether scripts can open new windows.

LocalStorage #

Enables LocalStorage.

LogSeverity #

Sets Chromium logging level:

• LOGSEVERITY_DEFAULT
• LOGSEVERITY_VERBOSE
• LOGSEVERITY_INFO
• LOGSEVERITY_WARNING
• LOGSEVERITY_ERROR
• LOGSEVERITY_DISABLE

If enabled, logs are written to cefdebug.log in the EXE folder.

MultiThreadingMode #

Configures CEF multithreading for file reading.
Disabling may improve compatibility but reduce responsiveness.

MuteAudio #

Mutes all audio output.

PersistSessionCookies #

Stores session cookies across app sessions.

Plugins #

Enables or disables plugins.

SendReferrer #

Controls whether the HTTP Referrer header is sent.

SmoothScrolling #

Enables smooth scrolling.

TabToLinks #

Allows the Tab key to navigate between links.

TextAreaResize #

Enables resizing of <textarea> elements.

UniversalAccessFromFileUrls #

Grants file URLs access to other URLs.

WebGL #

Enables/disables WebGL rendering.

WebSecurity #

Controls enforcement of the Same-Origin Policy.

WindowlessFrameRate #

Ignored by ExeOutput.