Microsoft failed to fix a CPU hogging bug even though it was caught early on Edge

This week, Microsoft has released Edge Stable version 144.0.3719.115, fixing a macOS bug that led to a 100% CPU usage bug where one core would get fully saturated during normal browsing. While the update is primarily a bug-fix release, it is a very significant one for Mac users who had reported overheating and degraded performance as a result of the bug.

The issue had been raised on community forums, where users described Edge consuming excessive resources and triggering fans even under light workloads as a result of the consequent overheating. The bug was first highlighted by a user, WCR, on the official Microsoft support forum, who noted that on their M4-based 16-inch MacBook, they saw high CPU usage. This query was upvoted by 23 other people (at the time of writing) seeking answers to a similar question, indicating the problem was fairly widespread. Users on Reddit also discussed the problem on a separate thread.

Interestingly, this bug was already caught early on in the testing cycle two months ago by Redditor Pale-Profile1570, but unfortunately, Redmond had failed to mend it, and it got pushed out to the stable channel.

On the changelog for Edge Version 144.0.3719.115, Microsoft writes: "Fixed a macOS issue that caused Microsoft Edge to fully saturate one CPU core under certain conditions."

This release follows a series of previous updates that introduced new features and addressed enterprise concerns. Version 144.0.3719.104 added cross-platform policy management for macOS, iOS, and Android, while also fixing Conditional Access sign-in issues. Meanwhile, version 144.0.3719.92 resolved rendering problems affecting SAP GUI applications built on WebView2.

And with version 144.0.3719.82, Microsoft rolled out a new WebGL backend powered by the company's Windows Advanced Rasterization Platform (WARP), replacing SwiftShader, and introduced enterprise-focused features such as tenant restrictions and Copilot toolbar visibility controls.

Thanks for the tip, ikjadoon!!

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Posted Sunday 8 February 2026 at 6:11 pm AEST (my time).

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