As may be clear by my ubiquitycommands github repository, I am an avid Ubiquity user. So much so, in fact, that I delayed upgrading to Firefox 5 until I was able to find a version of Ubiquity that works with Firefox 5. Wonder of wonders, I have found that version.
Satyr Murky continues to work on a community-maintained fork of the original Mozilla.org version of Ubiquity. Luckily for us, it works in Firefox 5.
Thank you, Satyr!
Code Nomad 
Awesome, thanks a bunch for this one!
This sounds great, and I can bring up Ubiquity in Firefox 5 now. However, I have zero commands. This is despite being subscribed to about a dozen feeds. Not a single command is being recognized as available for me to use. Any idea how to fix this problem? I’ve tried uninstall/reinstall, with an without rebooting the computer in between, clearing cache and cookies, but I’m still not getting any commands. I really like Ubiquity and want this to work. Any help you, or anyone else, can provide would be greatly appreciated. Thanks!
You sir, are my hero.
you’re a godsend