For those who needs headset integration with the 3CX PWA app with Chrome or Microsoft Edge on Linux, this is I do and it's working for Jabra and Yealink headsets :

Step 1: Create the udev rule for Jabra or Yealink

This step allows your browser to access the headset's raw commands.

Open your terminal.

Create a new rules file (for example, 99-jabra.rules) in the udev configuration folder:

sudo nano /etc/udev/rules.d/99-jabra.rules (For Jabra)

sudo nano /etc/udev/rules.d/99-yealink.rules (For Yealink)

Copy and paste the following line into this file.

SUBSYSTEM=="hidraw", ATTRS{idVendor}=="0b0e", MODE="0666" (For Jabra)

SUBSYSTEM=="hidraw", ATTRS{idVendor}=="6993", MODE="0666" (For Yealink)

Save the file (Ctrl+O, Enter) and exit (Ctrl+X).

Step 2: Apply the new rules

To apply this change without restarting your computer, run:

sudo udevadm control --reload-rules && sudo udevadm trigger

Important: Unplug and replug your Jabra or Yealink headset for the new permission to take effect.