RESOLVED: We're investigating reports of an issue with Gmail. We will provide more information shortly.

A Gmail web user incident occurred on October 29, 2024, and lasted for 22 hours and 46 minutes. During this time, some users experienced slow loading, unresponsive, or crashed web pages. Google apologized to affected customers, acknowledging that the incident fell short of their quality and reliability standards. The root cause of the issue was a recent update to a third-party browser extension that caused performance problems for Gmail web users who had the extension installed. Browser extensions have significant freedom to run their own JavaScript code on web pages, which can lead to unintended consequences or conflicts with the web page. Google engineers were alerted to the issue on October 30, 2024, at 07:04 US/Pacific and immediately started an investigation. The issue was fully mitigated at 11:44 US/Pacific after the third-party mitigated the issue from their end. To prevent similar issues in the future, Google is implementing testing for popular browser extensions and improving internal documentation and processes to enable faster response and mitigation times. The incident only affected the Gmail Web UI, and Gmail iOS/Android apps could be used as a workaround during the issue duration. The affected product was Gmail.