Chrome plugin file upload setFiles fails with Not allowed and upload forms can hang

Summary

The Chrome plugin can connect to Chrome and navigate normally, but repeatedly hangs/timeouts on an authenticated invoice upload form when trying to inspect controls, upload files, or capture a visual screenshot.

This blocked completing a browser task that required uploading receipt images through @Chrome only.

What happened

Using the Chrome plugin in Codex Desktop:

• browser.user.openTabs() worked.
• browser.tabs.list() / browser.tabs.get() worked.
• Navigation to https://www.zoetispetcare.com/account/rewards worked.
• Reading body.innerText() worked on the rewards dashboard and the initial invoice instructions page.
• Clicking through to the invoice submission flow worked.
• Once on the actual invoice form (/account/rewards/invoice), repeated Chrome-plugin calls timed out until the Node runtime reset.

Calls that timed out included:

• tab.playwright.locator('input[type="file"]').count()
• tab.playwright.locator('input').count()
• tab.playwright.locator('body').innerText(...)
• tab.playwright.waitForEvent("filechooser", ...) combined with clicking upload text/buttons
• tab.cua.get_visible_screenshot()
• tab.dom_cua.get_visible_dom()

The timeout pattern was consistent: the page stayed open in Chrome, but the plugin call hung until the tool reported a timeout and kernel/runtime reset.

Expected behavior

The Chrome plugin should either:

1. allow normal Playwright/CUA interaction with the upload form, including file chooser upload, or
2. fail quickly with an actionable error explaining that the page/frame/control cannot be automated.

It should not hang until the runtime resets.

Actual behavior

Chrome-plugin calls against the invoice form repeatedly timed out. This made it impossible to continue the task through @Chrome, despite the browser tab being navigated and logged in successfully.

Environment

• Codex Desktop on macOS
• Chrome plugin / Codex Chrome Extension
• Browser: Google Chrome
• Site: authenticated Zoetis Petcare Rewards invoice submission form
• Date observed: 2026-05-07

Notes

This may be related to file upload controls, authenticated pages, page scripts, or the plugin's DOM/CUA bridge on this specific form. The important product issue is that the plugin gets stuck instead of returning a bounded failure.