Proxy issues with the JCEF preview
JCEF preview supports proxy settings since 2021.1. Restart is required. See below how to do that.
Images and other referenced remote content might not show up in the preview.
Local files within the project show without problems.
The plugin’s settings inshows that “JCEF Browser” is used.
The user is behind a proxy, and the content in the preview includes remote files.
The JCEF preview doesn’t support the IDE’s proxy settings in version 2020.3 and earlier.
The JetBrains issue tracker shows that this is fixed in release 2021.1 Beta 3 (Build 211.6556.6).
For IntelliJ 2021.1 or later, the JCEF preview uses the proxy. After configuring the proxy, the user needs to restart the IDE for the setting to become effective.
The plugin supports different kinds of previews: Swing, JavaFX and JCEF.
As a workaround, consider using the JavaFX preview.
See section JavaFX Preview for more information on how to enable it.