I am searching and trying all sorts of things to get the browser mod pop-up to work but it seems there are changes in the integration or in HA that makes it difficult for me because every tutorial says something else.
I want to show a pop-up on an entity light.mylight. I added a pop-up card to my configuration:
I was confused like you the first time I used Browser Mod. A custom:popup-card is designed to replace a more-info for an entity. To use it is as simple as setting the entity in the custom:popup-card setting, and then whenever more-info is called for the entity, a custom card is used. You can also call via browser_mod.more_info.
There is also browser_mod.popup. There is no UI card designer for this service. You need to code the popup in yaml. There might be a feature to use a custom:popup-card with this service.
If you want to use custom:popup-card in a general way, you can use a dummy helper entity to do the gluing and then use briwser_mod.more_info to using the dummy helper entity.