First, of course, one must go into Settings and turn on the Bookmarks Bar by clicking one of the radio buttons to select its position (top or bottom, but not "off"). At the same time, one has the option to select a different folder of bookmarks to be shown on the bar, other than the default speed dial.
Well, I'm not kinda sure that you understood since you again mentioned going back to presto. So: one of the biggest reasons is that they just can't use presto no matter if they want or don't. It's Opera Software ASA property. It's not open sourced. It's just you can't use any car you just found on the street unless it's yours or "free to ride". (I'm not sure if any car is "free to ride" but whatever ).
Chromium (not Chrome nor Google) and Blink are both open source projects that are used by a lot of browsers. It's more or less an engine with a basic UI. The true is that Google is one of the biggest companies and when contributing it's a huge difference but it's not owned by them.
I agree with Grumbleskin, Mr. Pants and terzaerian. Coming from Opera 12.xx as my primary browser, over the last several years I have had to use IE, Firefox or Chrome to accomplish some work on the web.
Even though Vivaldi is in early development, I have not had any problems logging into the work related sites, use of passwords, etc. I have always used the Bookmarks panel in Opera, so I have had to learn to put the sites that are most important to me on Speed Dial. Eventually I hope that Vivaldi will have a Bookmarks panel that is sortable, but at this point, it is definitely not a deal breaker.
Patience is not one of my virtues, but I am enjoying waiting and watching what the Development Team releases each week. Those folks are working super hard and I thank them for all of their efforts.
I hope they get something like old Opera Sync together soon - it's one of the features I miss the most.
In the mean-time, the kludgey way I've been exporting Vivaldi settings has been by going ton/%appdata%/Local/Vivaldi and copying the user data folder and pasting it to other machines. Passwords dont survive the trip, but every other setting seems to.
That seems to be a more common problem with Chromium based browsers. In the past i tried various Chromium based browsers and at some point i also was running into problems, that when i decided to uninstall one i had problems with the second one too.
Chromium writes some couple of registry entries, much more worse as for example Gecko browsers. While it is no problem to have some Gecko browsers installed and removing one without problems, having 2 Chromium browsers around and removing one can indeed render the other useless as Registry entries are either deleted or overwritten.
If you just re-install the other browser it should work again. Alternatively you could mess around in the Windows registry but i would not recommend doing that.