Scrollbar Blindness
I have to pile onto the criticism of the hidden scroll bars, and other similar features (like the hidden buttons of PDF viewers now, such as in Chrome).  Discoverability is a problem.<p>For anyone (cough, elderly parents) who aren&#x27;t adept at discovering hidden features, these things can be utterly mind-boggling and frustrating.   Even I was stumped for a good minute the first time trying to print&#x2F;save&#x2F;download a PDF when that &quot;feature&quot; came out.<p>I don&#x27;t really need the small sliver of menu space in PDF view to be reclaimed -- and for what, a &quot;clean&quot; look?  Those are real and important functions I desire.  What I actually need is for news and blog sites to stop covering 1&#x2F;4 of their vertical window space with hovering frames, ads, and banners asking me to subscribe.   Which, by the way, subsequently don&#x27;t properly calculate into that now hidden scroll bar&#x27;s movement and cause you to overshoot the displayable area when paging down.  End rant.