I have moved my Piwik installation from
https://example.org/apps/piwik by just moving all the files via SSH and updating the trusted hostname in the configuration.
When I log into Piwik now via the new URL, it does not show any stylesheets:
From the Firefox console I have gathered that it cannot load URLs like
In another Firefox profile, it just works. On mobile, Firefox (synced with the main profile), no CSS is shown. In Chromium on the desktop and Chrome on Android, it also works. So it must be something inherent to my Firefox profile.
How can I fix this?