* Open up your Applications folder and find your old version of Firefox * Right click-> get info. * Rename to "Firefox36.app" * Download Firefox 4.0 and install as normal * Celebrate that you now have 1 more browser to test in!
Really simple! If someone knows how to do this on the Windows and Linux side, I would love to hear how.
Find an issue with this post? Think you could clarify, update or add something?
All my posts are available to edit on Github. Any fix, little or small, is appreciated!