1595369 - Broken UI: Tabs blocked when menu bar is triggered in macOS fullscreen

Status: RESOLVED DUPLICATE of bug 738335

(Core :: Widget: Cocoa, defect)

Description

[arnav]

Attachment: Firefox macOS broken UI.mov

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:70.0) Gecko/20100101 Firefox/70.0

Steps to reproduce:

1. Use default macOS menu bar settings (auto show/hide)
2. Open firefox and enter fullscreen
3. Drag pointer to top of screen, triggering the menu bar

Actual results:

Menu bar (along with window control buttons) comes down from the top and becomes visible, hiding half the firefox pane at the top, thereby blocking/eclipsing the tabs. [video attached]

Expected results:

Firefox should shift the pane at the top downwards to accomodate macOS menu bar, like in Chrome/Safari/Edge/etc. [video attached]

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

Bugbug thinks this bug should belong to this component, but please revert this change in case of error.