Recently I decided to start playing with Firefox extensions, and I needed to create a DEV profile for myself.
As usual I googled and found a good article on lifehacker by Gina Trapani, I read it. I followed the steps mentioned and I realized that it is not working.
After some tinkering and guess work I found that article had one crucial step missing(may be not as article is almost year old, and things may have changed since).
So I thought I will quickly write those steps down, for every one.
Step 1: Change the configuration
- Type “about:config” in Firefox address bar and press enter.
- Click “I’ll be careful, I promise” button. On next screen type “profile” in filter bar.
- Double click “profile.manage_only_at_launch” to set it to true.
- Close the Firefox web browser.
Now you can continue to follow the steps mentioned in lifehacker article.
For your convenience I have mentioned further steps below.
Step 2: Start profile manager
- Go to command prompt and type firefox.exe –profilemanger and press enter.
- This will start Firefox profile manager
- Now you can create a new profile.
Additional Useful Tips (From lifehacker article)
- You can bypass the step to choose profile every time you start Firefox by creating a shortcut for each profile.

Simply add -p profilename at end of you shortcut(as shown in the picture above), where profilename is name of the profile that you want to load. - If you want to load Firefox with different profiles together then add -no-remote as well, at the end of you shortcut.
- If you like to use ‘run’ a lot, then you can simply create a shortcut in windows directory, give that shortcut a short and sweet name. You can then use this name to start the Firefox with selected profile, by typing it in run window.


