[openstreetmap/openstreetmap-website] Should overlay layer activiations be preserved? (#2671)

[Andy Allan]

The status of which layers are active is preserved in the session. So if you are looking at e.g. the Humanitarian layer, and open the site in another tab (either now, or at some point later) you see the same background layer. I find this useful.

However, the same also applies to the overlays, namely the notes, data and trace overlays. I often open up a new tab, sometimes a few hours later or even the following day, and I'm surprised to see note icons appearing everywhere. Or more so, I'm happily browsing around until I zoom in too far, and then my browser dies while the data layer loads since I previously had that open when I closed a tab. Now I know how to turn the overlays off again, but I'm not sure that everyone else does.

So my question is - is this behaviour even useful? And if it is actually useful in a minority of situations, should we still turn it off anyway? I guess that in most situations having the overlay active on a fresh tab is surprising and unhelpful, but I'm interested to hear what other people think.

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