Feels like they're providing canary builds in a backwards order. First Windows, now Mac, and hopefully Linux soon. Seems like Linux users would be the most tolerant of failures and most likely to report issues accurately. Maybe Chrome has some awesome auto-error-reporting that I'm not aware of and they're just targeting market share?
Now I'm running Chrome 13. Google lets you run the Canary build along with another version of Chrome, just in case you find yourself with a bad update. Firefox sorely needs this feature.
Firefox nightly updates pretty much never hurt your data and very rarely are broken significantly enough that you can't use them for your daily work. I haven't had to revert more than two or three times in the last 5 years because of nightly bustage.
If you're really that concerned, just create a second profile and shortcut to Firefox with the -P "profilename" option and you're all set.
