I'm not trying to test an extension; I just want to run one remotely. Specifically, I'm trying to back up the OneTab bookmark extension. It has a feature to export its bookmarks, I'd just like to automate that.

The simplest example I have is this:

import { Builder, until } from "selenium-webdriver";

async function runScript() {
    const browser = await new Builder().forBrowser("chrome").build();
    try {
        await browser.get(
            "chrome-extension://chphlpgkkbolifaimnlloiipkdnihall/onetab.html"
        );
        await browser.wait(until.titleIs("webdriver - Google Search"), 5000);
    } finally {
        browser.quit();
    }
}

runScript();

Open the page, and see if anything resolves. When I run this, I get the following message:

chphlpgkkbolifaimnlloiipkdnihall is blocked
This page has been blocked by Chrome
ERR_BLOCKED_BY_CLIENT

There are a number of sites that talk about related issues with other extensions blocking access, but I've disabled all extensions. The error message itself says this isn't about extensions, but about Chrome itself blocking automated access to extension pages. This doesn't seem like that esoteric a request, and I suspect chromedriver-driven pages are blocked from accessing a lot of things for security reasons, but this is blocking progress on a simple script.

Any help?