When I click a non HTML link, FF asks me what to do, I select open and it opens the PDF with mupdf. I get that on windows you don’t want require people to download Acrobat reader, but why not just bundle FF with a good PDF reader on Windows? There must be open source projects doing PDF on Windows?

The last ESR of Firefox was reasonably fast, since I updated to 45 everything is sluggish. The upside is that some HTML5 audio features work better now, the downside is that the Youtube video player is so inefficient I needed to install a plugin that disables it (the fan is roaring).

Many years ago I installed a native Mplayer plugin for Firefox, and I could watch videos on the web. It was a 800Mhz CPU, and a 32MB Radeon graphics card? I could play videos without touching the CPU?

Right now I am typing a HN comment and FF sits at 100% for whatever reason...

My point is, everything implemented in a browser that is not a HTML/CSS renderer or JS JIT compiler, seems to suck to the point of being useless.

As much as I would like to get rid of the Flashplayer plugin, its the most reasonable way to play video in FF. Less of a CPU hog, less crashes. How did we get into this mess?