Issues with Outlook Web

[greybeard]

I have a case where I must use Outlook web version and login at the: https://login.live.com/ portal.
I've had little to complain about until recently when they began wanting to copy what I had just put on the clipboard, giving me the following message:

I have looked though the Site Settings, Flags, AdBlocker, etc to find a control to block this behaviour, if indeed I can, with no luck.
The obvious anwer is to quit using Outlook but fo now it is a necessity until I can find to archive over 20 years of emails.

Any suggestions greatly appreciated.

Edited to fix typos.

[luetage]

@greybeard Add the page to website permissions in vivaldi://settings/privacy/ by using the + button, make sure the new entry is selected. On the right side set Clipboard to Block, it’s probably set to Ask right now.

[greybeard]

Thanks... Actually it was already set to "Block" as I have little fath in what MS does behind the scenes I probably set it that way loooong ago and forgot about it.
Its that anoying Pop-Up, which is also blocked I'd like to get rid of... but it may be the only way to (possibly) ensure that it is not taking from my clipboard.