There used to be a workaround which I had to perform every few weeks:
https://forums.opera.com/topic/37578/solved-return-extention-sidebar-or-rework-the-main-one

As of today this workaround doesn't work any more, because the flag apparently doesn't exist.

Frankly, I've had it with this nonsense. I'm too tired to find a solution, again.
If you think you constantly need to break your browser, be my guest, I'll just go away then and hope firefox has fixed the memory leak issue in the meanwhile.

By the way the "Solved" tag on the thread linked above ought to be removed, and the topic activated again, because you guys just broke the workaround too. Congrats.

@sgunhouse Of course the removal of the flag is the issue, because it was the only workaround for a fundamental flaw that was never fixed at the root, the high minimum width of the sidebar.

There used to be a workaround which I had to perform every few weeks:
https://forums.opera.com/topic/37578/solved-return-extention-sidebar-or-rework-the-main-one

As of today this workaround doesn't work any more, because the flag apparently doesn't exist.

Frankly, I've had it with this nonsense. I'm too tired to find a solution, again.
If you think you constantly need to break your browser, be my guest, I'll just go away then and hope firefox has fixed the memory leak issue in the meanwhile.

By the way the "Solved" tag on the thread linked above ought to be removed, and the topic activated again, because you guys just broke the workaround too. Congrats.

@smidak
I found how to undo this change:
https://forums.opera.com/topic/37578/solved-return-extention-sidebar-or-rework-the-main-one

Actually I think it would be a great feature to integrate the sidebars into one, but not at the cost of fixed minimum width.

@smidak
This is quite a horrible change, do you know why it happened?
Was it some update to Opera that broke it, or what?

I don't think I want to live with the changed appearance, it is way too wide on my screen.
If only they wouldn't mess with things that work perfectly fine all the time.

Oh well, I guess it's time to change browsers again.