[adblocker-electron] Reddit and X.com broken with `fromPrebuiltFull`

[Spike O'Carroll]

Reddit doesn't load in Electron when either the ElectronBlocker.fromPrebuiltAdsAndTracking or ElectronBlocker.fromPrebuiltFull method is used on the session.

Code to reproduce is attached below. Here's a repo I made to test it.

const { app, BrowserWindow } = require("electron");
const { ElectronBlocker } = require("@cliqz/adblocker-electron");

let mainWindow;

function createWindow() {
  mainWindow = new BrowserWindow({
    width: 800,
    height: 600,
    titleBarStyle: "hidden",
  });

  mainWindow.loadURL("https://reddit.com");

  mainWindow.webContents.openDevTools();

  ElectronBlocker.fromPrebuiltAdsAndTracking(fetch).then((blocker) => {
    blocker.enableBlockingInSession(mainWindow.webContents.session);
  });
}

app.on("ready", createWindow);

app.on("window-all-closed", () => {
  app.quit();
});

Some other websites I tested that seem to be broken from loading by either one or both of these blocking options:

• https://x.com broken with fromPrebuiltFull
• https://reddit.com broken with fromPrebuiltFull and fromPrebuiltAdsAndTracking

Both do work, though, when using fromPrebuiltAdsOnly.

[Rémi]

Hey, did you try creating the browser window using the settings shown in the example here? https://github.com/ghostery/adblocker/blob/master/packages/adblocker-electron-example/index.ts#L20

I know there are some isolation settings which can prevent the adblocker from working properly in Electron.

[Spike O'Carroll]

Thanks for the quick response. Even with those settings, x.com and reddit.com don't load with fromPrebuiltFull (although they used to a couple months ago).