**Found in** * 151.0a1 (2026-04-15) **Affected versions** * 151.0a1 (2025-04-01) **Tested platforms** * Affected platforms: macOS 26, Ubuntu 24, Windows 11 * Unaffected platforms: none **Preconditions** * browser.settings-redesign.enabled: true **Steps to reproduce** 1. Inside Settings > Applications sections click multiple times on random dropdown from the Action. ****Expected result**** 1. The dropdown menu has the same size each time it is opened. **Actual result** * Sometimes the dropdown menu is smaller. **Regression range** * Pushlog: https://hg-edge.mozilla.org/integration/autoland/pushloghtml?fromchange=602084a80545c3aa2879ec54585f298966b00839&tochange=f2d92ead09bab0ed6a4bf50c16e4447144508cf4 * Possbile regressor: Bug 2017401 - please change if not correct **Additional notes** * Attached a screen recording.
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**Found in** * 151.0a1 (2026-04-15) **Affected versions** * 151.0a1 (2025-04-15) **Tested platforms** * Affected platforms: macOS 26, Ubuntu 24, Windows 11 * Unaffected platforms: none **Preconditions** * browser.settings-redesign.enabled: true **Steps to reproduce** 1. Inside Settings > Applications sections click multiple times on random dropdown from the Action. ****Expected result**** 1. The dropdown menu has the same size each time it is opened. **Actual result** * Sometimes the dropdown menu is smaller. **Regression range** * Pushlog: https://hg-edge.mozilla.org/integration/autoland/pushloghtml?fromchange=602084a80545c3aa2879ec54585f298966b00839&tochange=f2d92ead09bab0ed6a4bf50c16e4447144508cf4 * Possbile regressor: Bug 2017401 - please change if not correct **Additional notes** * Attached a screen recording.