Hints for font-viewer in main

org.gnome.FontViewer ⚙ amd64

icon-not-found
The icon 'preferences-desktop-font' was not found in the archive. This issue can have multiple reasons:
- The icon is not present in the archive.
- The icon is in a wrong directory.
- The icon is not available in a suitable size (at least 64x64px)
- On Debian and Ubuntu, the icon is a symlink. The generator cannot read symlinks on these distributions - make the icon a real file.
To make the icon easier to find, place it in /usr/share/icons/hicolor/<size>/apps and ensure the Icon= value of the .desktop file is set correctly.

asv-screenshot-media-url-not-secure
org.gnome.FontViewer.appdata.xml:54 - http://raw.githubusercontent.com/FontManager/resources/master/font_viewer_main.png
Consider using a secure (HTTPS) URL to reference this screenshot image or video.
asv-screenshot-media-url-not-secure
org.gnome.FontViewer.appdata.xml:64 - http://raw.githubusercontent.com/FontManager/resources/master/font_viewer_properties.png
Consider using a secure (HTTPS) URL to reference this screenshot image or video.
asv-screenshot-media-url-not-secure
org.gnome.FontViewer.appdata.xml:59 - http://raw.githubusercontent.com/FontManager/resources/master/font_viewer_character_map.png
Consider using a secure (HTTPS) URL to reference this screenshot image or video.
asv-nonstandard-gnome-extension
org.gnome.FontViewer.appdata.xml:35 - kudos
This tag is a GNOME-specific extension to AppStream and not part of the official specification. Do not expect it to work in all implementations and in all software centers.
asv-screenshot-media-url-not-secure
org.gnome.FontViewer.appdata.xml:69 - http://raw.githubusercontent.com/FontManager/resources/master/font_viewer_license.png
Consider using a secure (HTTPS) URL to reference this screenshot image or video.
asv-url-not-secure
org.gnome.FontViewer.appdata.xml:81 - http://fontmanager.github.io/
Consider using a secure (HTTPS) URL for this web link.