doesn't work with Fx 4.0b4pre.
Error: MSG_ALERT is not defined
Source file: chrome://venkman/content/venkman-utils.js
Error: console.commandManager is undefined
Source file: chrome://venkman/content/venkman-static.js
Oops! Yes, you're right. I've fixed the problem, the fix is in 0.9.88.1, which will hopefully be approved by AMO soon. Thanks for pointing this out!