There are many questions about getting FontAwesome icons to display properly. In most cases, these problems happen because of versioning conflicts (or less commonly, trying to load a Pro icon when you don't have a license).
Is there any easy way to test which FA versions support a specific icon?
For example, the comment icon has been around forever... since version 1.0.0. But on the "details" page, it says "Added to FA in v1.0.0" and "Last Updated in v6.2.0" with no other versions mentioned.
Does this mean it should exist in all FontAwesome versions between v1.0.0 and v.6.2.0 (current release)?
And is there any manual method to verify this easily?