I’m using it right now to read the opensuse forums and for this reply.
Is Konqueror usable for everyday work as a web browser, if there are any errors that I should know, whether there are hidden defects?
Yes, it is usable. I am using it in WebKit mode (not KHTML mode). If I switch it to KHTML, then more sites have problems.
It crashes a bit more often than “firefox”, but is reasonably stable. However, I do not use it for banking. I have not tried it for banking. For various reasons, I have a separate firefox profile that I use for that.
How is this safe web browser, whether it is convenient to use online internet banking, for gmail, for facebook , for google plus, for outlook.com, for youtube-multimedia, …
I have used it for gmail. I never did join up facebook, so I have no experience with that. I have not tried outlook.com either. Youtube videos are fine on konqueror. I’m not sure about vimeo, where I have had problems. Those problems might be because I have AdBlock (EasyList) turned on.
Recently I installed openSUSE 13.2 KDE, 64 bit, and firefox no integration with KDE wallet, a Firefox extension that would allow not very stable.
I also use firefox, and consider it more stable. But I have never used the Kwallet integration extension with firefox. Instead, I allow firefox to keep its own password (with a master password for protection). I consider it a benefit of firefox, that it is independent of KDE.
That’s why I work for everyday use web browser Konqueror because idim that it nicely integrates with KDE wallet. So far I have never used the web browser so I wonder what is the daily work, whether it is safe, reliable and stable?
I’m using konqueror in conjunction with Akregator. And it turns out that the majority of my browsing is done that way. However, I sometimes use “rekonq” instead of “konqueror”. You might want to give “rekonq” a try. It will use your “konqueror” bookmarks, your “konqueror” cookies (as with login cookies) and your “konqueror” saved passwords in kwallet. I have run into a few sites that complain about “konqueror” but do not complain about “rekonq”.
Problems with konqueror: One problem I had was with code blocks not being displayed properly at opensuse forums. Someone suggested this might be a font problem. So I changed the fixed width font. Then I changed it back. And now it works. It seems that it was not really using the default fonts until I made a font configuration change.
Also copy/paste at opensuse forums doesn’t quite work properly. But that’s a forums bug, not a konqueror bug. I went into the browser identification settings, and told konqueror to pretend that it is firefox when accessing opensuse forums. And, with that change, all is good.