Epiphany doesn't detect when network login is needed
I stayed at a hotel recently that required a login to access the internet. Firefox detected this and presented a button to take me to the relevant login page (a website from the hotel). Epiphany did nothing.
This is especially bad for people who do not have another browser installed, including those running the new Librem 5, since they will be both unaware of and unable to fix the problem, locking them out of internet access on the device. Even with another browser installed, Epiphany failing to reach the internet makes it seem as if there is a problem with the network, so users may fail to even attempt to use another browser.