Javascript from "www.Youtube.com" keeps popping up on every video play.

[bdsr006]

I seem to be getting this popup message every time I try to play a youtube video. This all started after I updated to the latest version of Vivaldi. I tried turning off the ad blocker, added Youtube to exclusion list, nothing helps. It is very annoying, I am left to use Firefox or Chrome until this issue is fixed.

Thanks.

[Eggcorn]

@bdsr006 That does not look like a Vivaldi error message! Did you disable your extensions? Because it's probably an extension doing this.

[Hadden89]

@eggcorn The message is triggered by Local YouTube Downloader. It is also written in the javascript popup even if the title could be seen as slightly deceptive. Probably, disabling adblock on youtube is the easiest way but someone could guide you @bdsr006 to do a whitelist for the extension with vivaldi blocker.
A small note: always be careful with downloader extensions. They have an higher chance to turn out malicious or being blocked from the store without any advise (they may violate store terms). Same if they are loaded as unpacked or as a external crx.

[bdsr006]

Oh I never suspected it was one of he Downloader extension, I will check that. I have tried disabling the ad blocker, made no difference. Vivaldi is a great browser, only issue I have was this annoying pop up message.
Thanks for he advice, will see if it gets rid of the message.