Been using as my sole web browser on a daily basis since it was called Qupzilla, maybe for 10+ years as I switched to it from reKonq.<p>I really like it because it's fully and truly integrated with KDE, not needed a whole sort of patchs to integrate to it like Firefox needs to.<p>It's actually great. Not sure about the "Qt doesn't upgrade WebEngine often enough" in other comment (what is "ofteh enough"? I got several updates for it over the year) and of course it can be lagging from stuff from mainstream, but I think for 99% of users it's just fine.<p>Granted, you can't use Chrome/Firefox plugins, which may it seem not worthy to some people, but there's a basic adblock and greasemonkey extensions shipped with it with default which blocks most of stuff and even you can install a script to speed up youtube ads so that annoying ad will run out in a sec or less. Apparently you can write your own plugins for it but last time I wrote to one of its devs the api wasn't even documented.<p>There are some quirks on it, though, like the user agent thing - I set up as the latest chrome user agent for every website except accounts.google.com where I left it as the one shipped with Falkon so it lets me sign in, and yet it shows a warning about "upgrading" to another browser.<p>Ironically, such "warning" also shows up when browsing discuss.kde.org. Yes, the very KDE discussion board warns you against using KDE's own web browser.<p>Since some years ago I have a silly idea about a plugin that transforms tabs into some sort of Vim buffer list thing that can be filtered by the url bar, but am too incompetent about C++.