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How about Vivaldi Browser?
(self.technology)
This is a most excellent place for technology news and articles.
I see. You might be pushing it harder than I typically do. I use it to setup new installs and get all my pluguns transfered and for keeping bookmarks and history synced and it works well for this. I'm not typically doing a lot of hot syncing looking for tabs to update rapidly etc. Be sure to give them feedback and upvote similar complaints on their blog.