Hello, XXXXXXXXX.
I hope you are trying to open the glass panel to get to the logs and fittings behind it, rather than having to clean up broken glass!!!
If so, there should be a narrow rectangle of louver or wedge-type gratings running lengthwise either above or below the glass front, if not both places.
One of these ought to pop free when shifted gently up or down. This will hopefully expose a handle or catch that will allow you to pop that glass front off.
I hope you found this answer helpful!!!
been there, d&one that
I know what I know