When attempting to import a MusicBrainz release into Picard so that it can be used for tagging files, the "tagger" button on MusicBrainz pages silently fails when browsed to with Safari. This can be tested with any Mac by having Picard open, going to any release page in Safari, appending ?tport=8000 to the URL, and attempting to use the green "tagger" button.

The data load is successful with other browsers (e.g., I had no issues with Firefox).

Some searching suggests that Safari automatically shunts localhost URLs to HTTPS; unfortunately, the workaround described in that link is no longer valid, at least when I tested today. App/browser testing tool BrowserStack describes this phenomenon as a known issue, but their workarounds are not applicable to us.