It seems more likely that Adobe supports Safari because Safari is the main browser on macOS. Adobe supports Windows and macOS (and I would guess a lot of their users are on macOS), so it doesn’t make sense not to support it, regardless of how cumbersome that makes the codebase.

Additionally, Photoshop Web (Beta), which is available to paying customers, has the same levels of browser support.

While we’re talking about history, Firefox was originally called Phoenix, then Firebird (trademark infringements), and was born from the ashes of Netscape Navigator (and the original architect behind the Mozilla project did not have much faith in the future of Mozilla and left the company/project).

Microsoft Edge was previously based on EdgeHTML, which was canned within 2 years, and is now based on Chromium. Opera used the Presto engine for a long time, but now uses Chromium, and a bunch of Opera developers used this as an excuse to split and create their own browser with their own—yeah, okay, Vivaldi uses Chromium too. There was a time when Google promoted Firefox on the front page of google.com instead of Internet Explorer. A time obviously before Google Chrome became a thing—after that, Firefox’s position as “second-most popular browser” was quickly retired. It’s kind of crazy Firefox ever managed to get that much market share considering it was competing with pre-installed browsers like Internet Explorer and Safari; Firefox was never pre-installed on any platform except GNU/Linux.

And Konqueror is still kind of around today. First comes the Navigator, then the Explorer, and then the Konqueror, anybody?