Deleting (intrusive?) Facebook files ok?
While I am not aware of the insides in detail, but I can comment(answer) on some.
/System/iOSSupport/System/Library/AccessibilityBundles/FacebookSettings.axbundle
/System/iOSSupport/System/Library/AccessibilityBundles/FacebookSettings.axbundle/Contents/MacOS/FacebookSettings


https://translate.google.com/translate?hl=en&amp;sl=zh-CN&amp;u=http://www.duozy.com/article/44379.html&amp;prev=search

http://yesanotheriphoneblog.blogspot.com/p/apple-apps-removal-list-60.html
indicate that these should be deleted from an iPhone after jailbreaking or otherwise to delete Facebook app from the iPhone. No comment on macOS there. However, I don't even have this(FacebookSettings.axbundle) on my Mac and never had FB on iPhone either.


/System/Library/Accounts/Access/FacebookAccessPlugin.bundle
/System/Library/Accounts/Access/FacebookAccessPlugin.bundle/Contents/MacOS/FacebookAccessPlugin


https://opensource.apple.com/source/kext_tools/kext_tools-326.1.12/systempaths.plist.auto.html
lists them for some reason.


All the tiff, png, icns files are just images and icons and I wouldn't mind them sitting where they are.
For the news one, it's a JavaScript file and it can be worth reading, if it's readable, to see what it has.
For the last two of Firefox, I routinely delete the Profiles folder every time YouTube's suggestions become obsolete or one sided. So you can delete that folder using Finder (yay!) and see if it comes up again. It could be a good thing to save to protect you from tracking!