audio/video .ogg and .pdf files handled by Firefox if no application specified (Windows only)
Search for partially selected link text from context menu (985824)
Removal of the CAPS infrastructure for specifying site-specific permissions (via capability.policy.* preferences). Most notably, attempts to use this functionality to grant access to the clipboard will no longer work. The sole exception is the checkloaduri permission, which may still be used as before to allow sites to load file:// URIs.