Well, I have committed extra updates which are supposed to satisfy current requirements.
The previous question is still valid. For now extension alerts if some canisters for dApp are missing Cover data.
Another obstacle I have is uploading extension to Chrome Web Store. To create an account I need to pay a bill - doing this recently became a huge trouble in country I live in. I will take a look at workarounds for this, but is it possible to upload it to web store by someone who has access to it?
For now i will fill the wiki for extension