1534004 - [KDE] Wrong titlebar buttons rendering

Status: NEW

(Core :: Widget: Gtk, defect, P3)

Description

[LEGXIII]

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:65.0) Gecko/20100101 Firefox/65.0

Steps to reproduce:

The buttons on the right side edge changes theme/color when Title Bar is disabled. How do I keep the desired theme/color as shown in picture 1 and still have the Title Bar disabled?

1. Install KDE Arc Theme (See links) and enable it.
2. Mozilla Firefox -> Right-Click -> Customize -> Title Bar -> Checked. Title Bar Enabled, see picture 1 below.
3. Mozilla Firefox -> Right-Click -> Customize -> Title Bar -> Unchecked. Title Bar disabled, see picture 2 below.

Links: https://addons.mozilla.org/en-US/firefox/addon/arc-dark-theme-we/
Picture 1 (Title Bar Enabled): https://i.imgur.com/21HXeRi.jpg
Picture 2 (Title Bar Disabled): https://i.imgur.com/fygjD2W.jpg

System Information:
KDE neon User Edition 5.15
18.04 Bionic
Mozilla Firefox v65.0.1 x64
Fresh installation of KDE Neon and default values using Mozilla Firefox.

Actual results:

The three buttons: Minimize, Restore, Close will change color/theme when Title Bar is disabled or enabled.

Expected results:

All three buttons should have the same color/theme as in picture 1, even if the Title Bar is disabled.

Comment 1

[LEGXIII]

EDIT:

Same issue in Kubuntu 18.10 when using Mozilla Firefox v65.0.1.