Thank you, I will look into those. I have lots of experience in html, but none with LTIs. I think I will leave my query fix in place for now and look into LTIs when I have time - it sounds promising. Thanks for the help. ... View more

Yes, my html pages are hosted elsewhere from Canvas, so window.parent.location is out. As you mentioned, my current work-around is to add a query string containing the course id to the url in every iframe, and then on my page I can grab the course id from the query to know what course linked to the page. That's not an ideal solution because, I now have to add a different tag for different courses every time I link to one of my external pages. This means if I import my pages to another class, I still have to go into all of my custom pages and change their url query strings. If the referrer still worked, all courses could use an identical link (for a given page) and the course would be determined automatically. Unfortunately, through some experimenting I've discovered that it's actually a browser issue: Google has decided to change the default referrer policy in Chrome to strict-origin-when-cross-origin when a site does not specify its own in the site header. That referrer policy does exactly what I'm experiencing: it gives the main site url of the referrer, but not the full referrer url. The old default (possibly still the default on some browsers?) was no-referrer-when-downgrade, which sent the full url as long as both domains were https. I would be interested to know whether my Canvas admin has access to setting the referrer policy. I kind of doubt it. But having access to that policy would solve the problem, since the browser default is only used when a site does not set its own policy. ... View more