When you pop the PDF out, it then gets passed to the full Preview.app.
Which, IMO, is the way it should be, and not just for PDFs. I'm impressed by the fact that Mozilla implemented a capable PDF reader in JavaScript, but I won't be using it. Firefox and Chrome are both trying too hard to duplicate everything my OS already provides: their own video codecs, audio codecs, image codecs, the Flash plugin (Chrome), now a PDF viewer, and so on. I'd rather just have my browser render HTML/CSS, run JavaScript, and that's about it. It doesn't have to implement anything else itself, all modern OS's should have everything required to display all the embedded content.
For some of the browsers it's clearly better for them to bundle the kitchen sink, since at least it's their kitchen sink and guarantees the kitchen sink will always be there.
https://wiki.archlinux.org/index.php/Chromium#Open_PDF_files...
Let's try Safari: Loads in under a second maybe even faster, super quick scrolling, ability to enter text and the option to download the pdf on the bottom. This is the way browsers should handle pdf. We are just not there yet. I don't want to use Safari though. Firefox is the browser for me.
I almost always download the pdf anyways and view it through Preview.app, especially if I want to actually input text in the pdf. I love Preview. It's like the best PDF reader out there. Preview is what liberated me from Acrobat. Well, switching to the Mac did that for me, really.