Script error always thrown on page load #10817
Description
Steps to reproduce
- Visit: https://kalkih.github.io/firefox-script-error-ios/
- An alert with the thrown ErrorEvent is shown.
The example to reproduce the issue consists of a window.addEventListener("error") which fires on the error and displays it in an alert
Source code for the example: https://github.com/kalkih/firefox-script-error-ios/blob/main/index.html
Expected behavior
No error should be thrown on page load
Actual behavior
An error is thrown on page load which fires the window.addEventListener("error")
Device & build information
- Device: iPhone 13 Pro Max running iOS 15.4.1
- Build version: Build version: 100.1 (9384)
Notes
With "Enhanced Tracking Protection" switched to on, the error doesn't seem to be thrown when accessing a root page. Can be reproduced by serving the index.html page in the example locally on "/"
┆Issue is synchronized with this Jira Task