It is impossible to open the "App Store" in Firefox:
Right clicking on the link does not offer me a way to open it in a new window, since you're probably using some frontend JavaScript library like React which breaks normal browser behavior.
So your UI is broken and unusable.
UPDATE: this problem seems to be intermittent, happening about 95% of the time. I have not figured out what the pattern is for determining if it happens or not. So the UI is broken and only occasionally usable.