mozilla/pdf.js — pull request #780 by arturadib (2011-11-08 16:02:43+00:00)
Title: Sidebar on/off button

No more accidental triggering of (CPU-intensive) thumbnail rendering due to mouse hovering. There's a new button `Browser` that toggles the sidebar on/off, and it's off by default. This is similar to OS X's Preview behavior.

Also, when the sidebar is switched off we now stop the cascade of thumbnail `.draw()` commands, which frees up the CPU. The rendering resumes when the sidebar is enabled again.