When comparing Falkon vs QtWeb, the Slant community recommends QtWeb for most people. In the question“What are the best lightweight web browsers?” QtWeb is ranked 3rd while Falkon is ranked 4th.
Ranked in these QuestionsQuestion Ranking
Pro Despite its very small size, it is self-contained: it does not depend on IE
Pro Very small download
Windows: installer ~8MB; portable (zip) ~7.4MB
Pro Very lightweight with minimal system requirements
Pro Windows version available in installer and portable (zip) formats
Pro Available for different operating systems
Windows, Linux, Unix and MacOS X.
Con Now under the KDE umbrella
Qupzilla is now discontinued and renamed to Falkon. It will also now be a part of KDE and will probably need more dependencies like kde-frameworks in the future.
Con Bookmark management not the strongest part
It often requires quite a lot of clicks to add and remove bookmarks.
Con Same security-holes as Chrome
Falkon uses the same browser engine as Chrome, meaning it has the same security-holes as Chrome. Chrome is a big target for hackers (being the most commonly used browser). A webpage that will hack Chrome will likely hack Falkon.
Con It's not in active development
Last version (3.8.5) was released on Sep 9, 2013.