I recently tried one of the test images for the upcoming F39 web-based installer ( Fedora-Workstation_local_02082023.iso). The browser window has a close button. Having a close button on the installer window is problematic for UX. It is inappropriate for an installer, looks out of place, and potentially causes confusion. The close button is also an obvious trip hazard - we don't want to encourage people to quit installation part-way through, yet that is what the button implicitly does. Reproducible: Always
This bug appears to have been reported against 'rawhide' during the Fedora Linux 39 development cycle. Changing version to 39.
We didn't found a way to solve this in a way of hiding the 'X' button. However, we have a way how to run the generic FF confirmation when closing the window. I think that solution should be enough for now because we solve the issue of user will accidentally click on the button. PR: https://github.com/rhinstaller/anaconda/pull/4948