Comment 29 for bug 1551171

Alex,

Firefox is still honoring mimeinfo.cache which is the title of this bug.

Even forgetting about any KDE specific support Firefox should honor

/usr/share/applications/defaults.list

so that a newly created user would have the system defined apps in line with his firefox settings. And a system administrador would know where to customize that on a system-wide manner.

You found a workaround that means doing things on a user-by-user basis - it is possible but brings manual work.

You say that Firefox currently uses GIO. If that is right then GIO has a bug because mimeinfo.cache should NOT be used as it lists applications in a random order and changes when packages are installed (therefore it can't be customized).

So the question is who to blame for mimeinfo.cache being used instead of defaults.list or xdg.