I just tried the History tab on the map page for the first time. It says "zoom in to see history" OK, do that until it works. But none of the entries are anything to do with the area I'm looking at. They are all global edits such as adding Arabic and Hebrew placenames (none in my little bit of Canada), or adding hundreds of airports all over the world. OK, on page 13 or so I can see the original data imports.

It would be nice to have a filter that removed the "big" edits from the history list.

osm.org/history?bbox=-126.0079%2C49.0996%2C-125.7722%2C49.1938