Electron 43

Apply the Node.js 24 and JavaScript ES2026 prompts first. Electron 43 pairs Chromium 150 and V8 15.0 with a Node.js 24 main process, is the last line to publish 32-bit Windows and Linux ARM binaries, and stops receiving security fixes when the line reaches its scheduled end of life in January 2027. Apply Node.js CLI rules only to supported execution modes: Electron GUI processes ignore --permission and --allow-*, and packaged apps cannot enable them through NODE_OPTIONS.

Renderer isolation and web preferences

• Ship every renderer on the Electron 43 defaults contextIsolation: true, nodeIntegration: false, and an enabled sandbox, and remember that setting nodeIntegration: true or nodeIntegrationInWorker: true disables the default sandbox when sandbox is unset; never ship with --no-sandbox.
• Never set webSecurity: false, allowRunningInsecureContent: true, experimentalFeatures: true, or enableBlinkFeatures on a window that renders content you do not fully control.
• Give mutually untrusted origins, tenants, and privilege levels their own session partition instead of sharing the default session across trust boundaries.
• Serve packaged application UI from a registered custom scheme rather than file:, and disable the grantFileProtocolExtraPrivileges fuse once nothing loads over file:.
• Treat any window using nodeIntegrationInSubFrames or nodeIntegrationInWorker as fully privileged and keep remote content out of it entirely.

Preload scripts and context bridges

• Expose one narrowly typed function per privileged operation through