macOS Mojave 10.14.4
Do more on the web, with a fast and secure browser!
Download Opera browser with:
"Allow sites to save and read cookie data" - is activated
"Keep local data only until you quit your browser" - is deactivated
I get signed out of Opera Synchronization not just all websites I visited. Today it happened twice. I didn't even force closed the browser.
It happened on Ubuntu 16 .. if it matters.