QGIS plugin. This plugin enables a layer menu in a nested tree structure based on .qlr files. The layer tree is nested according to the location in folder/subfolder of the .qlr files.
A Danish installation manual can be found in the the wiki.
The settings in QGIS 3 are found in the general settings:
Read Kurt Menke's blogpost about qlr-files and how to use and set-up the qlr-browser: https://septima.dk/nyheder/The-QLR-Browser-Plugin