Worst compared with what? I mainly use Acrobat Pro, but I find myself opening my PDFs in Firefox more and more. Acrobat is really slooooooow, it takes ages for

Worst compared with what? I mainly use Acrobat Pro, but I find myself opening my PDFs in Firefox more and more. Acrobat is really slooooooow, it takes ages for a cold start, and after it started the whole thing gets locked up for a minute or so. Absolutely infuriating. PDF.js/Firefox instead is just a smooth ride for me...