@jimunderscorep
No, the bookmarks were lost as I said because I did restart of the system.
I've just tried to chown the whole folder and files of config/opera and now it works like with sudo, meaning bookmarks, sites logins, whatsapp, etc. are lost, but basic settings, history, etc. are now back again in normal mode.
I am just not sure if by default all of files of this folder are owned by normal user or some of them are roots one so that there is not any privacy leaks or sth.

@jimunderscorep
When run by sudo it did run with all my settings, bookmarks, whatapp, etc.
I did a mistake and did not do the copy and restarted the system, and then I've lost bookmarks, whatsapp, etc, but the basic settings seems to be ok.
I think now it's too late and I will just give up.
One of my guess what happened is that some files got permission changes and later normal opera startup could not load some of the files.
Anyway, thanks for concern.

It seems yes, I've just added "--no-sandbox"

Hello Dear Community

Background story:
From time to time I had a problem with my Opera on my xubuntu 19.04 where from time to time(once week maybe), after turning on PC and starting the Opera, the Opera window appeared for like maybe 1 second and then crashed. Opera then starts to reboot itself few times, every times the same story happens with the message above bookmarks that Opera has crashed, and then after few times it gives up.
After dozens tries of running again it somehow finally runs.
But anyway, that lead me to check what will happened if I run Opera as sudo and it worked with all my settings(but I was not logged on common mails, forums etc. however).
After that running normally the Opera works and gives message box that: user profile could not be found, etc

I am not much concerned with the background story issue, because I beleve it would be to complicated to find the reason etc. so I just wonder if could there be anything I could try to do in such a case. I guess knowing where the user profile should normally be and what actually this running Opera as a sudo did.

Thanks

@jackyspeed said in Opera build-in save as pdf for lengthy webpage:

Indeed, if Opera can do this modification automatically, it would be most convenient for all users. There are too many technical things after all.

Yes, the question is how can we make them know about this issue, and that you are not alone in that?
I guess they are not checking every topic of this forum, and even if they found it, still they will consider it as not important/waste of time probably.

Same in my case, I found that Acrobat opens wrong the document, but it's saved as a whole and I can open in correctly in other pdf viewers.

Actually I was just about posting a thread, because I have also but a general issue with saving to pdf from long time, saving most of the web-pages, where when they are longer then normal, it saves only part of it, usually from the middle to the end.
Of course reinstalling and updating many times, nothing helped.
Would be glad to find a solution...
Thanks