Automatic font sizing and allow zoom were set from the accessibility menu in Fennec. Same issue when these options are disabled.
This is not severe for me, I can work around this.
What device, OS and browser version are you using when you experience this issue? Have you tried with another browser?
Have not. This is a 2022 moto g power with Android 12 and Fennec 129.
Chrome will loop the gallery in the same way.
Can't you see the name and the X to close the gallery at the bottom?
What's the default resolution of your phone/browser? (I think you can see that in android settings.