@ceskomira90 @climb 3 years late, but I also ran into the exact same problem as you and managed to avoid the popup from being blocked by using chrome.windows.create rather than window.open see docs: https://developer.chrome.com/docs/extensions/reference/api/windows#method-create

Getting this issue too, did anyone by chance figure it out? Thanks

Also getting this issue.

Try this format: "background": { "scripts": ["scripts/background.js"], "persistent": false }, I ran into the same issue where CORS was giving me trouble in MV3 after converting from a Chrome extension using the Xcode converter. I then stumbled across this answer https://developer.apple.com/forums/thread/654839?answerId=727731022#727731022 and it fixed it!

Hi, I came across this comment because I am facing the same issue. Have you found a fix for this? I just tested Honey's app and their onInstalled event runs without permissions needing to be set for context, here's a video of it: https://www.dropbox.com/s/a48ixh58wjpc2tj/onInstalledEvent.MP4?dl=0