Changelog

add support for writing plugins in QML
add MiddleClickLoader Python plugin
add page sharing to KDE Frameworks Integration plugin
add basic support for client certificates (QtWebEngine >= 5.12)
add support for registering custom protocol handlers (QtWebEngine >= 5.12)
change search bar appearance to match other KDE apps
use DBus instead of lockfile/socket to check and communicate with other instances (Linux) #404494
whitelisted cookies are no longer deleted when deleting all cookies
Python plugin support is now stable
close entire tree after middle click on collapsed tabs in VerticalTabs plugin #399217
fix some compatibility issues with QtWebEngine up to 5.12
fix some possible crashes in AdBlock
fix builds with standalone QtWebEngine releases