Thank you for the reply.
Sorry, forgot to mention – OS Win 10 x64.
I did everything mentioned in 'Before posting' before creating this topic, except checking with other browsers – problem was with every webpage I opened.
A few hours ago I launched memtest86 (had three BSODs in a row), and seems I have troubles with one of my RAM sticks (2x8Gb Vengeance, which I bought on 7th of Dec). Since it is very likely to be a hardware problem, I believe we can close the topic.
Sorry for bothering and blaming Opera
New update - Opera beta 50.0.2762.42, and the change log ;-)
The announcement: Opera 50 beta RC with Cryptocurrency Mining Protection.
"Opera’s big number 50 release is edging closer to its stable release. Today, we are delivering the release candidate, which includes an innovative anti-Bitcoin mining feature, extended VR360 support for Oculus, and Chromecast.
So please check Opera 50 beta RC out, and let us know how it works!
NoCoin – Cryptocurrency Mining Protection
Bitcoins are really hot right now, but did you know that they might actually be making your computer hotter? Your CPU suddenly working at 100 percent capacity, the fan is going crazy for seemingly no reason, and your battery quickly depleting might all be signs, that someone is using your computer to mine for cryptocurrency.
This cryptocurrency mining can sometimes continue, after you have first visited the site. But we, as the only major browser with an integrated ad blocker, have a built-in solution to keep miners from trespassing onto your machine.
After we recently updated the rules for our built-in ad blocker mechanism, we eliminated cryptocurrency mining scripts, that overuse your device’s computing ability. Simply enable Opera’s ad blocker to prevent cryptocurrency mining sites from doing their dirty work on your computer.
You can find, and change "NoCoin" in Settings (Preferences on macOS) > Basic > Block ads, and under the Recommended lists of ad filters.
With "NoCoin" turned on, webpages, that have embedded cryptocurrency mining scripts, will be blocked in a similar way in which our mechanism blocks ads.
Have fun testing, and Happy Holidays!"
The Chromium is updated to version 63.0.3239.84.
In my case, two windows of Opera Dev and conected to an external monitor, the options appears some moved but in the monitor, in the Laptop they appears normally.
Noticied few days ago, but probably already reported, at least in the blogs.
Windows 10 (x64) | Anniversary Update
Opera Stable · Beta · Developer
Opera Test profile | Opera Back up Linux · Mac · Win