The thing that I like most about QupZilla is that it is extremely like Firefox; I have the two side-by-side right now and QupZilla's menus are practically identical to Firefox's. It has:
- a download manager (although it is still separate, i.e. not tabized like FF's)
- a Password manager
- an RSS reader
- private browsing
- a ton of translations
- speed dial
- app tabs
- And best of all, it's cross-platform.
The part that makes it possibly better is that it is faster -way faster, both in rendering pages and in running. For example, I started them both up and even though I started Firefox a full second earlier, QupZilla made it up 2 seconds before Firefox did. I'm not sure if it's going to be much lighter on system resources; Qup is sitting around 215MB of RAM, and Moz is sitting around 300MB. That's with very light browsing (literally just opening Twitter and getting to Blogger for both), but hopefully Qup does better with memory leaks. I am sick of Firefox eating up 2GB of RAM when I have no tabs open.
The bad thing is that it does not have addons. That's really what makes the top three how great they are (not sure about Opera though) and it is quite literally the only thing stopping me from jumping ship to QupZilla. Granted, most of the addons I have installed I could easily do without, so here are the only 4 that really make my Firefox experience enjoyable:
- Roomy Bookmarks Toolbar
This wouldn't be a huge big deal to implement in Qup: just give the option to make bookmarks only favicons in the toolbar.
- Tab Mix Plus
There are really only a few options I use with this one: middle click opens the last closed tab, and a bunch of tab click options like "Bookmark All". QupZilla ships with many of the latter, so the former is all I really want out of it.
- Firefox Sync
QupZilla (understandably) does not have a sync service, which is dissapointing, but meh. I feel like I might just be able to build one, at least to sync with my Wuala folder. Besides, the sync thing used to be nice because I used Xmarks which synced with Chrome, but nowadays a sync service is just rather annoying, especially if I want to just view my bookmarks away from home.
I actually don't even use a theme anymore, I've dropped to a Persona, but the fact is that QupZilla doesn't even have them. It has 4 themes: one that looks like Chrome, Classic QupZilla (rather ugly IMO), and then Linux, Mac, and Windows. I don't expect Themes for Qup, but Personas would be so very awesome.
I still have yet to switch to Qupzilla because of one of the reasons that Bill commented on below: no encryption. I haven't checked if it has changed in the new version, but to my knowledge, it still stores all your usernames and passwords in one unsalted, unencrypted MySQL database, and that scares me to death.