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Firefox crashed and will not quit! Help!

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I accepted a Java update tonight and shortly after, I was trying to close Firefox to restart and it wouldn't do anything. It closed but it is still running and will not force quit. I cannot restart my computer, i keep getting the message that Firefox is open.

I accepted a Java update tonight and shortly after, I was trying to close Firefox to restart and it wouldn't do anything. It closed but it is still running and will not force quit. I cannot restart my computer, i keep getting the message that Firefox is open.

Additional System Details

Application

  • User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_4) AppleWebKit/600.7.12 (KHTML, like Gecko) Version/8.0.7 Safari/600.7.12

More Information

FredMcD
  • Top 10 Contributor
4254 solutions 59572 answers

https://support.mozilla.org/en-US/kb/firefox-slow-how-make-it-faster

https://support.mozilla.org/en-US/kb/firefox-uses-too-many-cpu-resources-how-fix

https://support.mozilla.org/en-US/kb/firefox-hangs-or-not-responding


Start Firefox in Safe Mode {web Link} by holding down the <Shift>
(Mac Options)
key, and then starting Firefox. Is the problem still there?

While still in Safe Mode,

In the address bar, type about:crashes<enter>. Note: If any reports do not have BP in front of the numbers/letters, click it and select Submit.

Using your mouse, mark the most resent 7 - 10 crash reports, and copy them. Now go to the reply box below and paste them in.

aboutcrashesFx29
'''https://support.mozilla.org/en-US/kb/firefox-slow-how-make-it-faster''' '''https://support.mozilla.org/en-US/kb/firefox-uses-too-many-cpu-resources-how-fix''' '''https://support.mozilla.org/en-US/kb/firefox-hangs-or-not-responding''' ---------------------- Start '''[https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode Firefox in Safe Mode]''' {web Link} by holding down the '''<Shift><br> ''(Mac Options)'' ''' key, and then starting Firefox. Is the problem still there? While still in Safe Mode, In the address bar, type '''about:crashes'''<enter>.''' Note:''' If any reports do not have '''BP''' in front of the numbers/letters, click it and select '''Submit'''. Using your mouse, '''mark''' the most '''resent 7 - 10''' crash reports, and '''copy''' them. Now go to the reply box below and '''paste''' them in. ;[[Image:aboutcrashesFx29|width=500]]
Dingeroo 6 solutions 85 answers

Firefox may hang during or after downloading files if your download history has grown too large. To clear the download history:

1. Click the Download button icon (downward arrow in top right corner of browser) and then click Show All Downloads. The Library window will open.

2. Click Clear Downloads to delete the download history - this doesn't delete any products you have downloaded, it only clears the list of them.

3. Download some sample files to see if the hanging has stopped.

Also maybe check if your chosen download folder is still available. It may not be. Open it through your system explorer - I am not a Mac user and don't know what this is called on a Mac. In Microsoft it is called Windows Explorer. I am sure Mac has an equivalent.

4. Firefox may hang if the last download folder location (e.g. a shared volume or USB drive) is no longer available. To fix this:

  • Click the menu button - the three bars in the top right hand corner of your Firefox browser - then choose Options.
  • Select the General panel.
  • In the Downloads pane, select the radio button beside Save files to and then click the Browse button.
  • In the Browse window, choose a new folder from those shown. This will be the destination folder for all of your downloads.

5. Now close the General preferences page. Any changes you've made will automatically be saved.

See if you are now able to download files and/or save images without Firefox hanging. If this works, you may like to go back to your Firefox settings, open Options again, as you did above, and instead change the location by selecting Always ask me regarding where to save your downloaded files. This way you can choose different destination files for each separate download, rather than they all going to the same folder. it is up to you.

Even so, your download history can still become bloated, so may need clearing as instructed above, from time to time.

Firefox may hang during or after downloading files if your download history has grown too large. To clear the download history: 1. Click the Download button icon ''(downward arrow in top right corner of browser)'' and then click '''Show All Downloads'''. The Library window will open. 2. Click '''Clear Downloads''' to delete the download history - this doesn't delete any products you have downloaded, it only clears the list of them. 3. Download some sample files to see if the hanging has stopped. Also maybe check if your chosen download folder is still available. It may not be. Open it through your system explorer - I am not a Mac user and don't know what this is called on a Mac. In Microsoft it is called Windows Explorer. I am sure Mac has an equivalent. 4. Firefox may hang if the last download folder location (e.g. a shared volume or USB drive) is no longer available. To fix this: * Click the menu button - the three bars in the top right hand corner of your Firefox browser - then choose '''Options'''. * Select the '''General''' panel. * In the Downloads pane, select the radio button beside '''Save files to''' and then click the '''Browse''' button. * In the Browse window, choose a new folder from those shown. This will be the destination folder for all of your downloads. 5. Now close the '''General''' preferences page. Any changes you've made will automatically be saved. See if you are now able to download files and/or save images without Firefox hanging. If this works, you may like to go back to your Firefox settings, open '''Options''' again, as you did above, and instead change the location by selecting '''''Always ask me''''' regarding where to save your downloaded files. This way you can choose different destination files for each separate download, rather than they all going to the same folder. it is up to you. Even so, your download history can still become bloated, so may need clearing as instructed above, from time to time.

Modified by Dingeroo

cor-el
  • Top 10 Contributor
  • Moderator
17516 solutions 158398 answers
Did you try to reboot the computer? See also: *https://support.mozilla.org/kb/Firefox+is+already+running+but+is+not+responding *http://kb.mozillazine.org/Profile_in_use