Microsoft Edge 149 update kills ‘disable rounded corners’ flag, here’s what still (kind of) works

Microsoft has removed the experimental flag that Let Users disable rounded corners in Edge, leaving fans of the older sharp-edged interface with few reliable options.

What Changed

Edge Version 149.0.4022.52 now applies rounded corners across several interface elements, including the address bar, news cards and the Copilot search bar on the home page. The change affects both Windows and macOS users.

On Windows, the flag controlling this behavior was removed entirely. Searching for “Rounded corners” in Edge’s experimental flags menu returns no results. On macOS, the flag still appears but does nothing — restarting the browser after disabling it produces no visible change.

Why Users Are Frustrated

Some users argue the removal is unnecessary. Experimental flags — settings buried deep in the browser’s developer options — are typically only discovered by technically sophisticated users. Removing even that limited control has drawn criticism online from people who simply prefer the older, sharper aesthetic.

Workarounds to Try

Two command-line workarounds have been shared on Reddit, though neither is guaranteed to work.

Option 1, suggested by Reddit user u/willianwadn20, involves editing an Edge shortcut’s target path:

1. Right-click an Edge shortcut on the taskbar or desktop and select Properties
2. In the Target field, add a space after the existing file path
3. Paste: `–disable-features=msFeatureGroupNewLookAndFeelHoldout`
4. Fully close Edge via Task Manager, then relaunch using that modified shortcut

Option 2, suggested by u/skullstrife, follows the same steps but uses a different command: `–enable-features=”msForceNoRoundedCornerAndMargin`

A third option involves editing the Windows Registry, though detailed steps require careful attention to avoid unintended system changes.

Results Are Inconsistent

Testing both shortcut-based workarounds produced no results. The commands appear either patched or inconsistent — working for some users but not others. A suggested fix involving Edge’s Startup Boost feature also failed to produce results. None of these workarounds can be recommended with confidence at this time.