First of all I'm sorry if I hijacked a thread but the header covered partialy my problem and so, instead of opening another thread containing also "wrong location", perhaps due to other reasons, I used this one ;-) Perhaps it was the "wrong location" :-)))
Yes I'm using the latest Firefox 93.0.
I do now understand that the layers preferences, despite what is written completely at the bottom of the folded-open layers-menu, are not saved in the Cloud but in the browsers cache.
I think that's were the problem lays as my Firefox settings are such that Firefox deletes cookies, site-data and caches upon Firefox closure.
Whether this also influences the location-settings, I don't know. Even with the latest Firefox the location setting goes back to the IP location instead of the selected preferred town.
It has to be noted however that this problem of not saving the location exist (only?) on my Macbook (Sierra 10.12.6, Firefox 93.0) but not on my iPhone App. I guess closing the App on an iPhone does not wipe out caches.
If deemed required we can continue this discussion in another thread; please advice ......