This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Firefox Quantum keeps asking me to close Firefox on external launch

GernuineAdvantage
GernuineAdvantage
more options

When launched directly from Explorer, Firefox Quantum (v62.0.3) works fine. But when launched indirectly, say via some other program sending a URL to the default browser (FF), FF launches first but then it always brings up a dialog box saying that I have to close FF first! When I click the dialog button to do that, the existing FF window is closed, then it re-launches with the requested URL.

I'm running 64-bit FF under64-bit Windows 10 Pro.

What's going on, and how can I fix this extremely annoying problem?

Thanks!

When launched directly from Explorer, Firefox Quantum (v62.0.3) works fine. But when launched indirectly, say via some other program sending a URL to the default browser (FF), FF launches first but then it always brings up a dialog box saying that I have to close FF first! When I click the dialog button to do that, the existing FF window is closed, then it re-launches with the requested URL. I'm running 64-bit FF under64-bit Windows 10 Pro. What's going on, and how can I fix this extremely annoying problem? Thanks!

All Replies (1)

GernuineAdvantage
GernuineAdvantage Question owner
more options

Added Info: Here is the text of the dialog pop-up in question:

"Firefox is already running, but is not responding. The old Firefox process must be closed to open a new window."