I've been trying to tweak around with CKEditor to do some different things like stripping down font-family from when the user copy pastes into the editor.
According to their documentation, the Advanced Content filter in automatic mode should strip down any style that isn't available in the UI.
' By default it is enabled and works in automatic mode, which means that CKEditor will only accept content that was defined as allowed by enabled CKEditor features (such as plugins or buttons).' - https://ckeditor.com/docs/ckeditor4/latest/examples/acf.html
So I tried to remove the font plugin with
config.removePlugins = 'font';
And it worked to remove the font dropdown from the UI, but the font-family is still not being filtered out as it should.
I also tried achieving the same thing by using disallowedContent as: