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add to bookmark default location
add to bookmark default location in opera is at the first of the menu of bookmarks and not at the end of the menu of bookmarks like other browsers that I used before.
So is there are any way to change that behavior?
No, there isn't. And opera is poor/problematic in general when it comes to bookmark management
I added this extension https://addons.opera.com/en/extensions/details/add-bookmark/
so if I want to add bookmark at the end of bookmarks I use it, and if I want otherwise I use the default bookmark button.