Show an error with the given URL when an iframe content is blocked
There are still pages which cross-reference content in iframe. It would be nice to make it easier to open an iframe link in a new tab when such blocking happens by showing an error in the iframe instead of an empty place.
Try for example:
https://finance.yahoo.com/sec-filing/TSLA/0001628280-24-017503_1318605?nn=1
The white rectangle shows nothing, while the iframe references:
https://cdn.yahoofinance.com/prod/sec-filings/0001318605/000162828024017503/tsla-20240331.htm
An error message in the iframe could be anything like:
Cannot open https://cdn.yahoofinance.com/prod/sec-filings/0001318605/000162828024017503/tsla-20240331.htm
due to site cross-reference.
Bonus points if the link is clickable.
For example duck-duck-go browser on Android does show an error in the iframe, with the link as well. Firefox also shows an error page, with a button "Open Site in New Window".
This is with epiphany-46.0-2.fc40.x86_64 and earlier version(s).