Enabling Mouse / "Show position of pointer when the Control key is pressed" causes Firefox tab copy opens a new windows

 * Cinnamon version (cinnamon --version)
Cinnamon 5.4.12
 * Distribution - (Mint 21, Arch, Fedora 37, etc...)
 Mint 21
 * Graphics hardware *and* driver used
 
Using this:   Device-1: Intel 4th Gen Core Processor Integrated Graphics driver: i915

 Graphics:
  Device-1: Intel 4th Gen Core Processor Integrated Graphics driver: i915
    v: kernel
  Device-2: AMD Sun XT [Radeon HD 8670A/8670M/8690M / R5 M330 M430 Radeon
    520 Mobile]
    driver: amdgpu v: kernel
  Device-3: Microdia Laptop_Integrated_Webcam_HD type: USB driver: uvcvideo
  Display: server: X.Org v: 1.21.1.3 driver: X:
    loaded: amdgpu,ati,modesetting unloaded: fbdev,vesa gpu: i915
    resolution: 1600x900~60Hz
  OpenGL: renderer: Mesa Intel HD Graphics 4600 (HSW GT2)
    v: 4.6 Mesa 22.0.5

 * 32 or 64 bit
 64 bit

In Firefox originally, when the one hold Crtl and and pull the the tab on tab bar it copies the tab. When the Mouse / "Show position of pointer when the Control key is pressed" option is enabled in seetings of Cinnamon it creates a new window and put the tab here.

Steps to reproduce

1. Enabling Mouse / "Show position of pointer when the Control key is pressed"
2. In Firefox push ctrl and pull a tab in tab bar
3. it creates a new windows with the pulled tab

When disable Mouse / "Show position of pointer when the Control key is pressed" it creates a new tab on tab bar.

Expected behaviour

Copy the selected tab.

Start by reproducing the issue with Cinnamon 5.4.12, Mint 21, Firefox, and the Mouse setting enabled, then compare the tab-drag behavior with the setting disabled. Trace the Cinnamon handling for “Show position of pointer when the Control key is pressed” alongside the Ctrl-drag interaction. Done means Ctrl-drag copies the selected tab instead of opening it in a new window.