Update:
I worked on some stuff the last couple of days. Unfortunately I still don't get the whole cookie stuff (they changed a lot here between Qt4 and 5).
What I could get to work is clearing cookies by simply removing the file that stores the cookies on the filesystem. This needs however a restart which is currently triggered in the code.

To sum up the new features/fixes:

• Fixed getting some links (especially relative ones) from site on longpress
• Fixed requesting new page links that don't use _blank target
• New default behavior "Open in New Tab" will open tab in background
• Added set default search engine
• Added a new icon based upon the one from Morpog (thx for that)
• Added clear cookies to settings (in PullDown Menu)
• Changed AddBookmark and settings to Dialog
• Save userAgentName and use it as default for AddBookmarks aswell
• Added 'Open in New Window'

RPM Download as usual from openrepos.net: https://openrepos.net/sites/default/....armv7hl_0.rpm

It takes a few days for the harbour version to be updated I guess.