Components All New MacOS Windows Linux iOS
Examples Mac & Win Server Client Guides Statistic FMM Blog Deprecated Old


Sets private browsing desire.

Component Version macOS Windows Linux Server iOS SDK
WebView 11.3 ✅ Yes ❌ No ❌ No ❌ No ❌ No
MBS( "WebView.SetUsePrivateBrowsing"; Value )   More


Parameter Description Example
Value The new setting.
Pass 1 to enable private browsing or 0 to disable.


Returns OK or error.


Sets private browsing desire.
You call this before a WebViewer is created and make your wish.
When FileMaker creates a WebViewer, we intercept and if you like to have private browsing, we switch to a non persistent data storage. Then we let FileMaker continue.

You would do a script like this:
  • Call MBS("WebView.SetUsePrivateBrowsing"; 1)
  • Go to a layout with web viewer
  • Load an URL
  • Script pause for maybe 0.1 seconds to let FileMaker create web viewer.
  • You can call WebView.SetUsePrivateBrowsing again pass 0.

If you like to be all Web Viewers in FileMaker be private, just call WebView.SetUsePrivateBrowsing once on startup in your start script. The setting persists till you disable it or FileMaker quit.

If you have two web viewer with both private browsing, you can login into the same website with two different accounts. Normally those would share the cookies and two accounts won't work.


Try private browsing:

# enable private browsing for next Web Viewer created
Set Variable [ $r ; Value: MBS( "WebView.SetUsePrivateBrowsing"; 1 ) ]

# Load a layout with Web Viewer
Go to Layout [ “WebViewerLayout” (Test) ; Animation: None ]

# Load a website
Set Web Viewer [ Object Name: "web" ; URL: "" ]

# And give FileMaker some time to create the web viewer!
Pause/Resume Script [ Duration (seconds): ,3 ]

# Going back to default to regular data source.
Set Variable [ $r ; Value: MBS( "WebView.SetUsePrivateBrowsing"; 0 ) ]

See also

Release notes

Blog Entries

This function checks for a license.

Created 11st June 2021, last changed 12nd June 2021

WebView.SetTitle - WebView.SetVirtualHostNameToFolderMapping