Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

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.

Cannot open after the lastest update

  • 2 replies
  • 1 has this problem
  • 14 views
  • Last reply by submarina

submarina
submarina
more options

I updated my Mozilla today and, after I closed it the last time, it just won't let me reopen. It shows a warning window saying: "Firefox is already running, but is not responding. The old Firefox process must be closed to open a new window."

I even shutted down and restarted my laptop, but it keeps giving me this same message when I try to open Mozilla. I unistalled, reinstalled... still the same warning.

Tried both close and cancel buttons, none worked to change a thing, nothing happens.

I updated my Mozilla today and, after I closed it the last time, it just won't let me reopen. It shows a warning window saying: "Firefox is already running, but is not responding. The old Firefox process must be closed to open a new window." I even shutted down and restarted my laptop, but it keeps giving me this same message when I try to open Mozilla. I unistalled, reinstalled... still the same warning. Tried both close and cancel buttons, none worked to change a thing, nothing happens.
Attached screenshots

Modified by submarina

Chosen solution

See:

Read this answer in context 👍 1

All Replies (2)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

Chosen Solution

See:

submarina
submarina Question owner
more options

Thanks! I tried all of them, but it did no work until the last one (the part of deleting the parent.lock was impossible 'cause it kept saying I had the Firefox running and the doc was in use).

The Restore data from a locked profile" option worked after I deleted all the profiles and created a new one. Thanks again!!