How to prevent Safari window re-sizing

How do I prevent the Safari browser window from spontaneously going full screen? Safari 27.0, MacBook Air M2 (2022) running Tahoe 26.7.2.

I can resize the window to the narrower column that I prefer, and then after a little while it just pops back to full screen. Very annoying. This is a new problem, perhaps with one of the latest software updates.

I've searched before and found supposed settings changes that address this, and attempted to implement them. But none have changed this Safari window behavior.

Posted on Nov 3, 2026 4:05 PM

1 reply

6x6

Level 7 (26,777 points)

Nov 3, 2026 5:31 PM in response to matthewfromramona

There is a setting in macOS Sequoia that maximizes a window automatically to full screen if you move it close to the menu bar. The setting to turn off is "Drag windows to menu bar to fill screen" in System Settings > Desktop & Dock. I don't know if it is still present in macOS Tahoe.