@burnout426
hi Guys,
I found it finally - it was YouTube Downloader (UDL Helper) extension well hidden...
I disabled it and now everything is back to the normal usage <20% cpu even with several tabs open,
Does it have in a test standalone installation of Opera One? If so, temporarily create a new user account on Windows (local one not tied to a Microsoft account), log into it and test Opera there? Does Opera do that there too?
You can use New Tab Start Page to set chrome-extension://laookkfknpbbblfpciffpaejjkokdgca/dashboard.html (that's the URL to Momentum's page) as the new tab page.
@spikenard Sorry about that. Assume you knew that would happen. I should have explicitly mentioned that you'd lose all opened windows and tabs and the recently-closed tabs list would be cleared.