K-Meleon vs QupZilla vs Otter Browser vs Midori - comparison of lightweight web browsers

Apart from the most popular web browsers for Windows - Google Chrome, Mozilla Firefox, Opera, IE and Edge - there are also more lightweight open source web browsers, which deserve more recognition. This time I am testing the latest versions of four of them: K-Meleon 76.0 beta 3 (based on Gecko), Otter Browser 0.9.10 (based both on QtWebKit and on QtWebEngine), QupZilla 1.8.9 (based on QtWebKit) and Midori 0.5.11 (based on WebKitGTK+), on a PC with Windows 8 and 2 GB RAM. In the comparison test I am focusing on HTML5 features, performance and RAM usage at startup and after loading four big websites in tabs.

Here are the results:

	K-Meleon	Otter QtWebKit	Otter QtWebEngine	QupZilla	Midori
HTML5 Test	467 pts	399 pts	525 pts	400 pts	341 pts
Octane Benchmark	5915 pts	1222 pts	6653 pts	1285 pts	806 pts
BrowserMark	1590 pts	1165 pts	1926 pts	1052 pts	149 pts
RAM at startup	35 MB	12 MB	54 MB	40 MB	40 MB
RAM at 4 tabs	151 MB	335 MB	236 MB	395 MB	271 MB

The best alternative web browser is Otter Browser with QtWebEngine (based on Chromium), made by a Polish developer Emdek. This is the only multi-process web browser out of them and has a really good performance. The second place goes to K-Meleon. That said, QtWebEngine is still in the works, so it may be buggy, and it uses more memory than Gecko engine used in K-Meleon.