@sidibecker I have the same issue- here's some potentially helpful info:

• From what I've read so far the spam appears related to React Dev Tools-
• These messages don't appear on Chrome while visiting the same React App in dev mode
• When I installed Chrome's React Dev Tools extension on opera, the behavior of the log messages changed. Instead of a big spam of a large chunk at a time, the log messages are now staggered (seemingly 0.5s-1s apart lending more credibility to the idea that React Dev Tools is related

It's an awesome extension, but I really wish there was an interface option for a normal bar
The dial option is extremely difficult to control - if you hold it with the mouse it starts drifting on its own and changing the volume, so the only way to get to where you want is to click, swipe fast and hope you land there. Most of the times, you wont and you'll have to do multiple adjustments. It is quite frustrating.
It is the only extension that does this though, so despite the UI pain, thank you for making it