RDP via RAC (Firefox only) opens context menu on every click

**Describe the bug**
Using RDP via RAC in Firefox shows a context menu with the option "paste" on every click. (left and right click)
It is in theory working as the click is getting registered. Just the context menu opens. Even on the title bar of Firefox itself.

I tested multiple Firefox Versions in the portable version: firefoxPortable_xxx_English.paf.exe

134.0 - same problem
130.0 - same problem
129.0.2 - same problem
129.0.1 - same problem
129.0 - same problem
128.0.2 - works!
125.0.3 - works!
120 - works!

**To Reproduce**
Steps to reproduce the behavior:
Connect to a Windows Server via RDP (RAC) [Windows Server 2022] and left-click on the desktop

**Expected behavior**
in this case: nothing :D

**Screenshots**

- authentik version: 2025.2.2
- Deployment: docker-compose

**Additional context**
discussed on [discord](https://discord.com/channels/809154715984199690/1344990160676327424)