647716 - After closing Firefox, upon reopen, a windows says there is already an instance of Firefox running. Please wait for it to close before starting a new instance.

Status: RESOLVED DUPLICATE of bug 407981

(Firefox :: General, defect)

Description

[don_ensley]

User-Agent:       Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0) Gecko/20100101 Firefox/4.0
Build Identifier: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0) Gecko/20100101 Firefox/4.0

After closing Firefox, then upon reopening it, a windows pops up and says that I have to wait because there  is already an instance of Firefox running. I have to wait too long after closing Firefox for the process to stop!

Reproducible: Always

Steps to Reproduce:
1. Open Firefox. 
2. Close Firefox.
3. Immediately reopen Firefox. Observe box saying Firefox is already running.
Actual Results:  
You will have to wait at least 15 seconds until you can start a new instance of Firefox and have it open correctly. It should instantly stop.

Comment 1

[Tim (fmdeveloper)]

Does the issue still occur if you start Firefox in Safe Mode? http://support.mozilla.com/en-US/kb/Safe+Mode

How about with a new, empty profile? http://support.mozilla.com/en-US/kb/Basic+Troubleshooting#Make_a_new_profile

Also see -> http://support.mozilla.com/en-US/kb/Firefox+is+already+running+but+is+not+responding

Comment 2

[Tim (fmdeveloper)]

Any update?

Comment 3

[don_ensley]

Error occurs in both safe mode and not in safe mode for Firefox 4, windows 7, 64-bit.

Comment 4

[don_ensley]

For example, IE 9 after shutting down will immediately restart OK, starting a new browser window. Firefox says there is another instance (i.e. as if it does not shut down immediately when the browser window is closed). The instance of Firefox that lingers prevents a new window from immediately being opened.

Comment 5

[Ben Dougherty]

This bug lists the common reasons of why it occurs. https://bugzilla.mozilla.org/show_bug.cgi?id=639307

I can replicate this bug on Mac OS X 10.6.7 64-bit running Firefox 5. I have also replicated on a Fedora box but I don't have access to that right now to post the information.