**Found in** * Nightly 155.0a1 **Affected versions** * Nightly 155.0a1 **Tested platforms** * Affected platforms: Windows 11 x64, macOS 26.04, Ubuntu 24.04 **Preconditions** * Enable Compact density in about:preferences#appearance. * Enable the Browser Toolbox by setting devtools.chrome.enabled = true, devtools.debugger.remote-enabled = true **Steps to reproduce** 1. Inspect the height of the Address bar using the Browser Toolbox. **Expected result** * The Address bar should match the [Figma specifications](https://www.figma.com/design/XT0eDYh4RtbMNWaYQi0efM/Chrome-Sidebar-UX-Specifications--Sprint-1-?node-id=12167-95254&t=mpm6CJAhEpudp3bf-0) and be reduce to 28px. **Actual result** * The height of the Address Bar is 26 px. **Regression range** * This is not a regression, it was implemented with the compact mode styling done in Bug 2030953.
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**Found in** * Nightly 155.0a1 **Affected versions** * Nightly 155.0a1 **Tested platforms** * Affected platforms: Windows 11 x64, macOS 26.04, Ubuntu 24.04 **Preconditions** * Enable Compact density in about:preferences#appearance. * Enable the Browser Toolbox by setting devtools.chrome.enabled = true, devtools.debugger.remote-enabled = true **Steps to reproduce** 1. Inspect the height of the Address bar using the Browser Toolbox. **Expected result** * The Address bar should match the [Figma specifications](https://www.figma.com/design/XT0eDYh4RtbMNWaYQi0efM/Chrome-Sidebar-UX-Specifications--Sprint-1-?node-id=12167-95254&t=mpm6CJAhEpudp3bf-0) and be reduce to 28px. **Actual result** * The height of the Address Bar is 26 px. **Regression range** * This is not a regression, it was implemented with the compact mode styling done in Bug 2030953. **Additional notes** * The issue is reproducible with both horizontal and vertical tabs.