If you just want to view some places without giving location access, use this link: https://dev.explore.allmaps.org/
I also noticed that the search is broken
It's really interesting to see how far off these old charts are when overlaid on modern GIS data, but still pretty impressive for the time.
One important thing which is missing is the year of the map (a name would be nice too, but not as important as the year)
Also, on Android, all icons blink on the index page, but that's pretty minor.
EDIT: I'm really confused because it's the same IP I get from various "online dig" services. When the page loads, I get an HTTP 301 that redirects to that suspicious looking domain that somehow does not resolve... it also happens across multiple browsers and devices.
It's a blast, but in French only so you'll have to fiddle around a little.
https://map.geo.admin.ch/#/map?lang=en¢er=2682327.37,124...
With a bit of a london focus (since that's where I live)
https://www.layersoflondon.org/
https://mapoflondon.uvic.ca/agas.htm
Finally this site:
Map platforms from Brazilian cities that allow browsing with old map layers:
Curitiba 1857
https://geocuritiba.ippuc.org.br/portal/apps/webappviewer/in...
São Paulo 1930
https://geosampa.prefeitura.sp.gov.br/PaginasPublicas/_SBC.a...