13 has turned out to be another problematic release for our friends in Mountain View. Besides these issues above forcing a chemspill, which is never desirable, the highly hyped New Tab page is really unpopular in SUMO. Even considering the fact that the displeased are usually the most visible, New Tab comments are 76% negative. Fortunately, it is pretty easy to turn off with the cube icon at the top right, or by a dive into about:config (browser.newtabpage.enabled to false, or browser.newtab.url to about:blank), but someone apparently forgot to tell the peanut gallery. There are also sporadic reports of issues with SPDY on Gmail and Twitter.
With regard to 14, the changes are largely at the UI level. 14 introduces the first support for plugin click-to-play, but this isn't enabled by default, and it doesn't change the fact we don't support plugins anyhow (this just guards against drive-by attacks, not errant clicks, so I don't consider it to be enough of a satisfactory security solution with the state of PowerPC plugins). It also does some more rearranging of the deck chairs by changing the address bar iconography for secure sites, again, but the Awesome Bar is now smarter about hostnames and domains, and that is a welcome change; there is also initial support for the Pointer-Lock API for games, and some performance improvements. Note that those of you who have used the AuroraFox build on 10.5 will have probably seen this already. The big improvements are still not scheduled until Fx15, and Tobias' early work indicates we have some compatibility issues we will need to work out with the JIT plus bustage from the libvpx upgrade in that release, so I might start that port early to see how much damage there is.