Anytime I open a new tab in Vivaldi (1.12.955.38) it causes Xmarks (1.0.33) to get a yellow notification with an exclamation mark in it. When I hover over it, I get a pop-up that says "Changes to sync". To make it go away, I have to manually sync even if I have auto sync enabled. This does not happen in other browsers besides Vivaldi.
I'm not sure if this is an issue with Vivaldi or Xmarks, but I thought I'd let someone know. Thanks in advance!