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Firefox does not open

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My Firefox suddenly stopped opening. I open it, icon appears in dock and immediately disappears. I did a fresh install of 57.0.4 and still the same. It's not already running (checked activity monitor).

PC: MacBook Pro (13-inch, 2016, Four Thunderbolt 3 Ports) OS: macOS High Sierra 10.13.2 (17C205)

In /Library/Application Support/Firefox/Crash Reports there are two files: InstallTime20171226083017 InstallTime20180103231032

My Firefox suddenly stopped opening. I open it, icon appears in dock and immediately disappears. I did a fresh install of 57.0.4 and still the same. It's not already running (checked activity monitor). PC: MacBook Pro (13-inch, 2016, Four Thunderbolt 3 Ports) OS: macOS High Sierra 10.13.2 (17C205) In /Library/Application Support/Firefox/Crash Reports there are two files: InstallTime20171226083017 InstallTime20180103231032

Additional System Details

Application

  • User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36

More Information

FredMcD
  • Top 10 Contributor
4248 solutions 59420 answers

What's your computer system and Firefox version?

Some problems occur when your Internet security program was set to trust the previous version of Firefox, but no longer recognizes your updated version as trusted. Now how to fix the problem: To allow Firefox to connect to the Internet again;

  • Make sure your Internet security software is up-to-date (i.e. you are running the latest version).
  • Remove Firefox from your program's list of trusted or recognized programs. For detailed instructions, see

Configure firewalls so that Firefox can access the Internet. {web link}

What's your computer system and Firefox version? Some problems occur when your Internet security program was set to trust the previous version of Firefox, but no longer recognizes your updated version as trusted. Now how to fix the problem: To allow Firefox to connect to the Internet again; * Make sure your Internet security software is up-to-date (i.e. you are running the latest version). * Remove Firefox from your program's list of trusted or recognized programs. For detailed instructions, see '''[https://support.mozilla.org/en-US/kb/configure-firewalls-so-firefox-can-access-internet Configure firewalls so that Firefox can access the Internet.]''' {web link}

Question owner

FredMcD said

What's your computer system and Firefox version? Some problems occur when your Internet security program was set to trust the previous version of Firefox, but no longer recognizes your updated version as trusted. Now how to fix the problem: To allow Firefox to connect to the Internet again;
  • Make sure your Internet security software is up-to-date (i.e. you are running the latest version).
  • Remove Firefox from your program's list of trusted or recognized programs. For detailed instructions, see
Configure firewalls so that Firefox can access the Internet. {web link}

Hey FredMcD, thanks. I have mentioned my Firefox and system info in the question. I'm not running any Internet security program and my firewall is off.

''FredMcD [[#answer-1064044|said]]'' <blockquote> What's your computer system and Firefox version? Some problems occur when your Internet security program was set to trust the previous version of Firefox, but no longer recognizes your updated version as trusted. Now how to fix the problem: To allow Firefox to connect to the Internet again; * Make sure your Internet security software is up-to-date (i.e. you are running the latest version). * Remove Firefox from your program's list of trusted or recognized programs. For detailed instructions, see '''[https://support.mozilla.org/en-US/kb/configure-firewalls-so-firefox-can-access-internet Configure firewalls so that Firefox can access the Internet.]''' {web link} </blockquote> Hey FredMcD, thanks. I have mentioned my Firefox and system info in the question. I'm not running any Internet security program and my firewall is off.
FredMcD
  • Top 10 Contributor
4248 solutions 59420 answers

arjunu said

I'm not running any Internet security program and my firewall is off.

There is a lot of malware out there which makes your lack protection very dangerous.


Start Firefox in Safe Mode {web link} by holding down the <Shift> (Mac=Options) key, and then starting Firefox.

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?


Start your Computer in safe mode with network support. Then start Firefox. Try Safe websites. Is the problem still there?

http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode Starting Any Computer In Safe Mode; Free Online Encyclopedia


arjunu said

In /Library/Application Support/Firefox/Crash Reports there are two files:
InstallTime20171226083017
InstallTime20180103231032

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

The crash report is several pages of data. We need the report numbers to see the whole report.

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

aboutcrashesFx29

For more help on crash reports, see; https://support.mozilla.org/en-US/kb/firefox-crashes-asking-support

''arjunu [[#answer-1064264|said]]'' <blockquote> I'm not running any Internet security program and my firewall is off. </blockquote> There is a lot of malware out there which makes your lack protection very dangerous. ---------------- [https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode Start Firefox in Safe Mode] {web link} by holding down the '''<Shift> ''(Mac=Options)''''' key, and then starting Firefox. A small dialog should appear. Click '''Start In Safe Mode''' (not Refresh). Is the problem still there? ------------------ Start your '''Computer''' in safe mode with network support. Then start Firefox. Try '''Safe''' websites. Is the problem still there? http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode Starting Any Computer In Safe Mode; Free Online Encyclopedia ------------------------- ''arjunu [[#question-1199497|said]]'' <blockquote> In /Library/Application Support/Firefox/Crash Reports there are two files:<br> InstallTime20171226083017<br> InstallTime20180103231032 </blockquote> In the address bar, type '''about:crashes'''<enter>. '''Note: ''' If any reports do not have '''BP-''' in front of the numbers/letters, click it to submit them. '''The crash report is several pages of data. We ''' '''need the report numbers to see the whole report. ''' Using your mouse, '''mark''' the '''most recent 7 - 10''' crash reports, and copy them. Now go to the reply box and paste them in. ;[[Image:aboutcrashesFx29|width=500]] For more help on crash reports, see; https://support.mozilla.org/en-US/kb/firefox-crashes-asking-support

Question owner

FredMcD said


Start Firefox in Safe Mode {web link} by holding down the <Shift> (Mac=Options) key, and then starting Firefox.

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?


Start your Computer in safe mode with network support. Then start Firefox. Try Safe websites. Is the problem still there?

http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode Starting Any Computer In Safe Mode; Free Online Encyclopedia


I tried holding Option key and starting Firefox, same result. Restarted my Mac in safe mode and no luck.

I tried running this in the terminal:

/Applications/Firefox.app/Contents/MacOS/firefox-bin -safe-mode

It says: The patch directory path is not valid for this application (/Users/arjunu./Library/Caches/Mozilla/updates/Applications/Firefox/updates/0)

''FredMcD [[#answer-1064269|said]]'' <blockquote> ---------------- [https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode Start Firefox in Safe Mode] {web link} by holding down the '''<Shift> ''(Mac=Options)''''' key, and then starting Firefox. A small dialog should appear. Click '''Start In Safe Mode''' (not Refresh). Is the problem still there? ------------------ Start your '''Computer''' in safe mode with network support. Then start Firefox. Try '''Safe''' websites. Is the problem still there? http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode Starting Any Computer In Safe Mode; Free Online Encyclopedia </blockquote> I tried holding Option key and starting Firefox, same result. Restarted my Mac in safe mode and no luck. I tried running this in the terminal: /Applications/Firefox.app/Contents/MacOS/firefox-bin -safe-mode It says: The patch directory path is not valid for this application (/Users/arjunu./Library/Caches/Mozilla/updates/Applications/Firefox/updates/0)
FredMcD
  • Top 10 Contributor
4248 solutions 59420 answers

Let’s do a full clean re-install;

Download Firefox For All languages And Systems {web link}

Save the file. Then Close Firefox.

Using your file browser, open the Programs Folder on your computer.

Windows: C:\Program Files C:\Program Files (x86)

Mac: Open the "Applications" folder. https://support.mozilla.org/en-US/kb/how-download-and-install-firefox-mac

Linux: Check your user manual. If you installed Firefox with the distro-based package manager, you should use the same way to uninstall it. See Install Firefox on Linux; https://support.mozilla.org/en-US/kb/install-firefox-linux

If you downloaded and installed the binary package from the Firefox download page, simply remove the folder Firefox in your home directory. http://www.mozilla.org/firefox#desktop ++++++++++++++++++++++++++++ Look for, and remove any Mozilla or Firefox program folders. Do not remove the Mozilla Thunderbird folder if there is one.

Do Not remove the profiles folder.

After rebooting the computer, run a registry scanner if you have one. Then run the installer. +++++++++++++++++++++++++++ If there is a problem, start your Computer in safe mode and try again.

http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode This shows how to Start all Computers in Safe Mode; Free Online Encyclopedia

Let’s do a full clean re-install; [http://www.mozilla.org/en-US/firefox/all/ Download Firefox For All languages And Systems] {web link} Save the file. Then '''Close Firefox. ''' Using your file browser, open the '''Programs Folder''' on your computer. '''Windows: ''' C:\Program Files C:\Program Files (x86) '''Mac: ''' Open the ''' "Applications" ''' folder. https://support.mozilla.org/en-US/kb/how-download-and-install-firefox-mac '''Linux: ''' Check your user manual. If you installed Firefox with the distro-based package manager, you should use the same way to uninstall it. See Install Firefox on Linux; https://support.mozilla.org/en-US/kb/install-firefox-linux If you downloaded and installed the binary package from the Firefox download page, simply remove the folder Firefox in your home directory. http://www.mozilla.org/firefox#desktop ++++++++++++++++++++++++++++ Look for, and remove any '''Mozilla''' or '''Firefox''' program folders. Do not remove the '''Mozilla Thunderbird''' folder if there is one. '''Do Not''' remove the profiles folder. After rebooting the computer, run a registry scanner if you have one. Then run the installer. +++++++++++++++++++++++++++ If there is a problem, start your '''Computer''' in safe mode and try again. http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode This shows how to Start all Computers in Safe Mode; Free Online Encyclopedia

Question owner

Nope, didn't work.

Nope, didn't work.
FredMcD
  • Top 10 Contributor
4248 solutions 59420 answers

I called for more help. Did you have any problem with the prior Firefox?

I called for more help. Did you have any problem with the prior Firefox?

Question owner

Thanks. No this is the first time I'm having an issue with Firefox.

Thanks. No this is the first time I'm having an issue with Firefox.
FredMcD
  • Top 10 Contributor
4248 solutions 59420 answers

Just something to think about;

Install Older Version Of Firefox {web link} Be sure to read everything here.

If you still want to downgrade, look under; I still want to downgrade. Click the Directory of other versions and languages link. Look for the directory of the version that you want. But, remember that old versions may have security issues.

You should also check out Firefox; Extended Support Release {web link} ESR Notes System Requirements


First, Type about:preferences#advanced<enter> in the address bar. Under Advanced, Select Update.

[v56+] Type about:preferences#general<enter> in the address bar. Select Update.

Select Never Check For Updates.

Also turn off Use a background service to install updates <Windows Only>

Just something to think about; [https://support.mozilla.org/en-US/kb/install-older-version-of-firefox?cache=no Install Older Version Of Firefox] {web link} Be sure to read everything here. If you still want to downgrade, look under; '''I still want to downgrade. ''' Click the '''Directory of other versions and languages''' link. Look for the directory of the version that you want. But, remember that '''old versions may have security issues. ''' You should also check out [https://www.mozilla.org/en-US/firefox/organizations/ Firefox; Extended Support Release] {web link} [https://www.mozilla.org/en-US/firefox/organizations/notes/ ESR Notes] [https://www.mozilla.org/en-US/firefox/organizations/system-requirements/ System Requirements] ---------------- First, Type '''about:preferences#advanced'''<enter> in the address bar. Under '''Advanced, ''' Select '''Update. ''' [v56+] Type '''about:preferences#general'''<enter> in the address bar. Select '''Update. ''' Select '''Never Check For Updates.''' Also turn off '''Use a background service to install updates''' <Windows Only>

Question owner

FredMcD said

First, Type about:preferences#advanced<enter> in the address bar. Under Advanced, Select Update.

I installed 56.0.2 It worked. I was able to browser. Then I tried updating. It said restart to install update. I did that and same issue. Now I clean installed 56.0.2 again and same issue

''FredMcD [[#answer-1064786|said]]'' <blockquote> First, Type '''about:preferences#advanced'''<enter> in the address bar. Under '''Advanced, ''' Select '''Update. ''' </blockquote> I installed 56.0.2 It worked. I was able to browser. Then I tried updating. It said restart to install update. I did that and same issue. Now I clean installed 56.0.2 again and same issue

Question owner

This is interesting:

I opened the dmg file for 57.0.4 and did not move it to Applications directory. Instead I double clicked and opened it. And it worked!

Tried moving it to other directories and it doesn't work. Only when I directly open it from the mounted dmg it works.

This is interesting: I opened the dmg file for 57.0.4 and did not move it to Applications directory. Instead I double clicked and opened it. And it worked! Tried moving it to other directories and it doesn't work. Only when I directly open it from the mounted dmg it works.
FredMcD
  • Top 10 Contributor
4248 solutions 59420 answers

Helpful Reply

I called for more help.

I called for more help.