Firefox Web Browser icon is seperate to running icon

The Issue

In the applications menu, Firefox Web Browser appears with the correct name.

When launching, it's name changes to just Firefox, and its icon appears as a greyscale version, instead of the usual symbolic version.

This is not particularly annoying - just a minor inconsistency, but it means that the running Firefox icon is separate to the pinned icon.

I did recently install Firefox inside wine, which added a new shortcut, but I don't see how it could conflict.

The last time I encountered this issue was in Windows 7 and with Google Chrome, so it's been a while.

I have tried reinstalling Firefox, but that didn't help.

If I favourite Firefox instead of Firefox Web Browser, the icon won't launch anything. If I favourite Firefox Web Browser, it will launch as a separate icon.

There may have been some background updates (I kept automatic updates on for security reasons - I don't usually bother to install them otherwise).

I can probably manage this small issue, it just may be a bit hard to get used to having the icon in two different places. I don't want to pin them next to each other, because that looks even weirder - I'm already used to some non-native apps having this issue.

Edit: It seems to be related to Wine, as when launching from the new logo, Wine starts up, before closing again.

Screenshot

It didn't take me long to realise that this was directly related to Wine.

I hid the duplicate version of Firefox in my menu, but Firefox Web Browser must have picked up the other desktop file.

I fixed this by removing "~/.local/share/applications/Firefox.desktop" and "~/.local/share/applications/wine/Programs/Firefox.desktop".

If this happens to you, don't use Wine if the software is already available in Linux. I was just doing this for fun to see what happened. If you do want to do this, make sure to remove the desktop files properly, otherwise you may encounter issues.

I have had similar issues with desktop files, such as adding a Java-based application to my menu, and all Java processes appearing with the same icon in System Monitor.