(Opening a new issue because it's pretty important but I have no idea where to report this.)

The new JavaFX 8 Javadoc hangs Firefox 28 on Windows forever when you try to open it:
http://docs.oracle.com/javase/8/javafx/api/toc.htm

Other browsers on the same system can open the online Javadoc correctly. Interestingly, this does not happen when I open the downloaded JavaFX doc package locally -- but then the text body font looks pretty terrible. Investigating "stylesheet.css" shows that it attempts to load 'resources/fonts/dejavu.css' which is not present locally -- and apparently cannot be loaded by Firefox remotely.

The new Java SE 8 (not JavaFX) Javadoc opens correctly on all browsers, including Firefox:
http://docs.oracle.com/javase/8/docs/api/index.html

Two more issues in both docsets: On Mobile Safari, no scrollbars appear for the lists of classes & packages => endlessly long page. And the W3C validator says that no character encoding was explicitly specified, so different browsers might default to different encodings.