I have Firefox 3.6 installed and have just seen that Firefox 4 Beta is available. Is it possible for me to install Firefox 4 Beta alongside my current Installation of Firefox?
Firefox – Install Firefox 4 Beta alongside Firefox 3.6
firefoxfirefox-3.6
Best Answer
Yes, it is. This also works fine with the final release of Firefox 4. When you install, choose to customize the install. Then just make sure to select a different directory than where Firefox 3.6 is installed. I just did it yesterday, works fine!
If you want to be able to use both 3.6 and 4 Beta at the same time, you'll need to launch the 2nd one you open with the
-no-remote
command line, and specify a different user profile (can't open the same user profile twice at the same time). For more details on that, see Firefox command line arguments.Important: This does not work when using Firefox Portable, it does not recognize the
-no-remote
switch.Update: If you want to keep separate profiles for your stable and beta installations, create two different profiles. Start
"<path to firefox>\firefox.exe" -ProfileManager
. Your existing profile will already be there ("default"). Create a new profile (call it "testing" or whatever), then choose that.If you want Firefox to choose a specific profile for a specific installation every time you open it, you can modify the shortcuts to specify a profile. Change it to
"<path to firefox>\firefox.exe" -P "Profile Name"
. This is case sensitive. It will then always open that profile. You could also just uncheck the box for "don't ask at startup" and choose yourself every time you start.