How to disable middle-click paste in KDE Plasma (Wayland)

how-to-disable-middle-click-paste.md

Environment

• Arch Linux
• KDE Plasma 6.1.5 (Wayland)

Solution

For native Wayland applications

1. open the KDE system settings
2. select "Workspace" -> "General Behavior"
3. uncheck "Middle Click: Paste selected text"
4. Restart the system

For Xwayland applications

(e.g. Discord, etc.)

1. Install XMousePasteBlock

$ yay -S XMousePasteBlock

Perhaps you should choose xmousepasteblock-git. (I failed to build with the xmousepasteblock one)

2. Registering a service in systemd

Create mousepasteblock.service in /etc/systemd/system.

[Unit]
Description=Userspace tool to disable middle mouse button paste in Xorg.

[Service]
ExecStart=/usr/bin/xmousepasteblock

[Install]
WantedBy=multi-user.target

3. Reboot the system

For Firefox

Set middlemouse.paste to false in about:config.

Extra

How to enable middle-click scrolling.

For Firefox

Open Firefox Settings and search for "Scroll", Enable "Use autoscrolling".

For Electron software

Add --enable-blink-features=MiddleClickAutoscroll to the startup argument.

Some sentences may be incorrect because they were translated from Japanese using deepl translation.

On my end, installing xmousepasteblock worked fine on CachyOS using paru.

However, the provided service didn't really work for me. Instead I installed the one provided by program developer, as a user service:

nano ~/.config/systemd/user/xmousepasteblock.service
systemctl --user enable xmousepasteblock.service
systemctl --user start xmousepasteblock.service