The last example, of course, is one that we all know too well. Yes, it seems that even big download sites like CNET and Sourceforge, which regularly have a fake download button on real download ...

Some examples would be like the image below, that looks like a download or play button, but is really a nasty ad that probably activates a pop-under and who knows what other kinds of garbage.

The download button on Firefox, much like Edge disappears a while after the download completes. To make it stay up there, visit the Settings option and click on Customize Toolbar.