Yes I discovered that yesterday. Actually download.cdn.mozilla.net still works, Mozilla just removed the mozilla.org directory, so I changed that line to:
ffdownload="http://download.cdn.mozilla.net/pub/firefox/releases/34.0.5/linux-i686/en-US/firefox-34.0.5.tar.bz2"
But I was too tired last night to package it up and submit a new extension, I'll probably get to it later today.
It also managed to make my root FS read-only somehow after the download failed, forcing a reboot, after a failed attempt to rebuild mydata.tgz, which still copied the last one to mydatabk.tgz, so it wasn't found at the next boot, which caused me a lot more confusion because then I could no longer access it remotely. I should try to work out where that went so wrong as well really.