As of today I can not copy and paste from Opera browser. I can copy and paste everywhere else, it seems to be only Opera browser that is broken. I googled and found that Opera had this issue back in 2015, apparently the bug is back!
https://forums.opera.com/topic/9941/copy-paste-not-working

Version:63.0.3368.94
Opera is up to date
Update stream:Stable
System:Windows 10 64-bit

@leocg that is my question, yes. Did you require more clarification?

Why are extensions not allowed in the opera browser for Android?

As of today I can not copy and paste from Opera browser. I can copy and paste everywhere else, it seems to be only Opera browser that is broken. I googled and found that Opera had this issue back in 2015, apparently the bug is back!
https://forums.opera.com/topic/9941/copy-paste-not-working

Version:63.0.3368.94
Opera is up to date
Update stream:Stable
System:Windows 10 64-bit

What happens if I have Opera browser on two different computers, each one with completely different bookmarks, and then I create a Synchronization account? Does one overwrite the other or is Opera smart enough to merge the bookmarks together?