brave/brave-browser

PWA window outside frame corners remain rounded on Linux even with system titlebar enabled

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#53,461 建立於 2026年3月9日

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OS/DesktopOS/Linuxfeature/pwahelp wantedpriority/P5

描述

Brave Version: 1.87.192 (Chromium 145.0.7632.120) OS: Ubuntu 24.04.4 LTS DE: GNOME 46.0 on X11 GPU: AMD Radeon Vega

Problem

PWA app windows (e.g. WhatsApp Web) have rounded outside window frame corners that cannot be disabled.

What I tried:

  • "Use system title bar and borders" = ON ✅
  • "Show rounded corners on main content areas" = OFF ✅
  • Added --use-system-title-bar to PWA desktop file ✅
  • Disabled BraveWebViewRoundedCorners flag ✅
  • All failed — PWA corners still rounded ❌

Proof this is Brave controlled:

  • Regular Brave browser windows = square corners ✅
  • Pure GTK apps = square corners ✅
  • Only Brave PWA windows = rounded ❌
  • Changing GTK theme has zero effect on PWA corners

Expected behavior:

PWA windows should respect "Use system title bar" setting exactly like regular Brave windows do.

Related issue: #50033

貢獻者指南

技術棧
cppcss
領域
desktop
議題類型
bug
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
3
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
1-2 days
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
fresh
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
clear
前置要求
Chromium internalsLinux window managementGTK basics
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
30
研究方向
Investigate how Brave applies rounded corners to PWA windows on Linux. Look at the Chromium window frame implementation, specifically the handling of the 'Use system title bar and borders' setting and the 'BraveWebViewRoundedCorners' flag. Compare with regular Brave browser windows and GTK apps. The related issue #50033 may contain additional clues. Consider modifying the PWA window creation code to respect the system title bar setting.