I installed the two versions ff-3.6 and ff-3.7 within the ubuntu
nightly ppa.
And when i try to access to about:jetpack, in the console error, i get
this :
Error: XULApp is not defined
Source File: file:///home/aurelien/.mozilla/firefox-3.6/tj4jk00g.default/extensions/
jet...@labs.mozilla.com/modules/xulapp.js
Line: 108
Error: Extension is undefined
Source File: chrome://jetpack/content/js/log.js
Line: 219
Error: console is not defined
Source File: chrome://jetpack/content/js/jetpack-environment.js
Line: 125
Error: Extension is undefined
Source File: chrome://jetpack/content/js/jetpack-runtime.js
Line: 403
Error: FeedManager is undefined
Source File: chrome://jetpack/content/js/app.js
Line: 67