It would be so nice if we are able to get rid of the Flash on any browsers completely. I like the idea of using the HTML5. However, I downloaded the HTML5 plug-in on my FireFox and maybe Safari. I don't know the difference because some websites still asked me to accept the Flash that allow me to watch the videos.
For Portable Document Format (PDF), it is owned by Adobe. I can't remember if the Apple stuck that it signed an agreement with the Adobe a long time ago by mistake. I am an Adobe stockholder and hate it ever more because of ridiculous CC monthly fees.
Beside, I am very glad that I found another software instead of Photoshop which cost 30 dollars. I really like Pixelamator that runs on iMac. I also like the Macaw Indigo web design app instead of Dreamweaver which is also run on iMac and IBM PC. The Pixelamator and Macaw save a lot of your time than spending many hours on Adobe software.