Message Firefox is already running when trying to open link from another software




Startup and Profile System
2 years ago
2 years ago


(Reporter: lfayolle, Unassigned)


41 Branch

Firefox Tracking Flags

(Not tracked)




2 years ago
User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:41.0) Gecko/20100101 Firefox/41.0
Build ID: 20151014143721

Steps to reproduce:

1) open a link from a software
2) open another link from a software

Actual results:

1) Firefox is launching, OK
2) Error : Firefox is already running

Expected results:

When it worked, the second link was openned in a new tab

I've tried : 
- uninstall Firefox and install version 45
- use version 4.1
- upgrade from windows 8.1 to Windows 10
- clean firefox install with ccleaner
- clean firefox install with Revo
- Manually clean all entry in registry

I think the problem began when i tried to define several profiles.
I've been searching a solution for 2 months but it seems that Firefox keeps information somewhere about previous installations.


2 years ago
Component: Untriaged → Startup and Profile System
Product: Firefox → Toolkit

Comment 1

2 years ago
Did you reset the option about Firefox as default browser in Win 10?

In addition, open the profile manager ("run > firefox.exe -p") then check your current profile is selected by default and delete the other profiles you don't want to keep.

Order of profiles is saved in the file profiles.ini:
Flags: needinfo?(lfayolle)

Comment 2

2 years ago
Yes, when i removed Firefox, IE was defined as default browser.
I also removed all profiles.
But after reinstalling Firefox (a lot of time), it stills no work.
I have now only the default profile enabled.
It seems that some things of older install can't be deleted.
I just want to make a clean install of Firefox expecting it will work well as it was previously :
1) first link clicked launch firefox
2) second link clicked opens a new tab in firefox 
Flags: needinfo?(lfayolle)

Comment 3

2 years ago
Did you add the command -no-remote to the default profile?

Comment 4

2 years ago
It's a command line option, no ?
How can i add this option when clicking a link in thunderbird for example ?

Comment 5

2 years ago
Unfortunately, we don't have enough information here to create actionable next steps. It's possible that windows is misconfigured somehow, or there's a bug that affects your specific install but not most users.
Last Resolved: 2 years ago
Resolution: --- → INCOMPLETE
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