I am writing this Web Extension for Safari. It is designed to run on both macOS and iOS.
The extension-specific javascript/css/etc files are shared between the platforms.
What I observe is that the extension is running fine on macOS. It also runs fine on the iOS Simulator.
However, on my device, just nothing happens when activating the extension. No errors are output to the console either.
I found it out the hard way, when I already released the extension in the AppStore, and installed it on a friend's iPhone.
Does anyone have a clue where I even could start debugging? Or better: maybe there is just a simple checkbox that that I should (un)check?