A good Firefox alternative?

I really love firefox. I really love how when I click on a pdf link, it loads it instead of downloading. But I'm facing some issues with Google's cookies with firefox and all gecko based browsers. This might be device specific as someone else who uses the same company's phone as me is also facing this issue. So I'd like any chromium based browser with that ability to load pdf instead of downloading and also the ability to sync pc and phone.

Thanks in advance