
The icon shows a blue plus, but I don't see any allowed second-level sources.
For http://mail2world.com/:

The icon is "All disallowed", but there is an allowed second-level source.
For https://www.mapleprimes.com/products:

When I load the page, the icon shows that some elements are blocked, as it should, but if I switch to another tab and back, it shows "All allowed", while there is a blocked second-level source.
Am I misinterpreting the meaning of those icons?