Updating
AppImage files are now released as gitlab packages as well at https://gitlab.com/librewolf-community/browser/appimage/-/packages. This allows having stable links (at https://gitlab.com/api/v4/projects/24386000/packages/generic/librewolf/latest/$FILE_NAME) which can be used as update information for the AppImage releases.
This means that from this release onward, AppImage releases can be updated with AppImageUpdater.
A release downloaded as LibreWolf.x86_64.AppImage, for example, can be updated with ./AppImageUpdate-x86_64.AppImage -d ./LibreWolf.x86_64.AppImage.