By default, the Collabwriting Extension panel opens on the right side of your browser. If you prefer to have it on the left, you can change this in the settings.
How to change panel position
Open the Collabwriting Extension in your browser
Click on the Settings button in the top-right corner
Find the Open Panel on the Right option
Toggle it off to move the panel to the left
Once changed, the panel will open on your chosen side automatically.