I recently released the new version of go2mapillary, a plugin for exploring and extracting information from Mapillarys streel level imagery from QGIS3.
It is now possible to add a Mapillary coverage basemap for any location and any coordinate system and filter it by user and shot time.
Furthermore it is possible to compare and tag images, place markers from plugin widget and store and annotate them locally.
Check it at GitHub - enricofer/go2mapillary: a plugin for displaying and extracting information from Mapillary street level imagery with QGIS (3.0) or download the plugin from QGIS plugins repository: https://plugins.qgis.org/plugins/go2mapillary/
Feel free to send me any suggestion or report any issue