In KDE4 and in KF5 until recently, Konqueror had the "Performance - Minimise Memory Usage" option. Unless this was set to "Always" (with the caution "Use with care"), Konqueror would open new windows in a separate process if it considered it to be appropriate. Now, with the removal of this option, all Konqueror windows appear to share the same process (i.e. it was as if the former option was set to "Always"). This would not be a problem if everything always worked perfectly, but the trouble is that a single crash (or a hung or runaway process needing to be killed) anywhere - which may not be the fault of Konqueror, but possibly in one of the HTML parts or any other viewer part - will destroy all of the user's Konqueror windows regardless of what they are showing. And sometimes I have tens of them open... Please consider reinstating this option, possibly with the default being "Always" if it is felt that this is the most appropriate setting now.
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Still an issue with current Konqueror.
(In reply to Jonathan Marten from comment #2) > Still an issue with current Konqueror. The problem is that we had to switch to a new web engine, QtWebEngine, since the old QtWebKit engine wasn't developed anymore, and the new engine assumes that only one process exists at any time. I don't know whether there's a way to work around this limitation, but doubt it.