I tried Firefox for a few days... And It looked ugly compared to Crome

( not to mention slower )
I regularly switch between the two and, as of three days ago, it's Firefox's turn again.
I don't know how you could say Chrome is prettier than Firefox: FF generally has a way more polished and customisable interface (can even
make it look like Chrome, if you want) and has
Personas (themes) which you can choose from (if you're into that).
I prefer Firefox. The sync feature works better than Chrome's imo.
I find they both have their issues, but more often than not, Chrome's sync works better for me than Firefox's. It's also a lot more comprehensive (universal with your Google Account) than Firefox's, which requires you to keep your sync key stored away (long live Dropbox).
What I like about Chrome is that it syncs with my Chrome browser on my phone and if I format all I have to do is log into Chrome and Voilà , everything is pretty much back to normal.
I'd totally love a Foxchrome or Chromefox, FireChrome or ChromeFire, or whatever combination of the two exists.
Unfortunately, Chrome's biggest drawback to me is that its addons are heavily policed by beaurocratic red tape, especially the occasional flash-video downloading one: they're not allowed to download YouTube, Vimeo, etc videos because of "copyright infringement" risks.
And that's one place where Firefox excels: features.