Reboot the computer. Then,

Start Firefox in Safe Mode {web link}

A small dialog should appear. Click Start In Safe Mode (not Refresh). 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 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 resent 7 - 10 Submitted crash reports, and copy them. Now go to the reply box and paste them in.

For more help on crash reports, see; https://support.mozilla.org/en-US/kb/firefox-crashes-asking-support +++++++++++++++++++++++ If you can't get Firefox to open, you will have to do this the hard way.

https://support.mozilla.org/en-US/kb/mozillacrashreporter Open the file browser/explorer on your computer. Note: You may have to enable Show Hidden Folders / Files. Enter this in the address bar;

Windows: %APPDATA%\Mozilla\Firefox\Crash Reports\submitted Win 7/Vista: C:\Users\<username>\AppData\Roaming\Mozilla\Firefox\Crash Reports\submitted Win XP/2000: C:\Documents and Settings\<username>\Application Data\Mozilla\Firefox\Crash Reports\submitted

Mac OS: /Users/<username>/Library/Application Support/Firefox/Crash Reports/submitted Linux: /home/<username>/.mozilla/firefox/Crash Reports/submitted

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

Copy the most recent 5-7 File Names in the folder. Post the information in the reply box.

bp-61f50fe9-dab0-4664-aa94-f8ce60200220 2/20/20, 11:26 AM View bp-036cb932-2256-4827-90a9-4b8bd1180212 2/11/18, 9:31 PM View bp-5e9bb4ea-32fe-42b7-98c3-a99250200224 2/24/20, 9:58 AM

It crashed more times than this the past 2 days but these are all of the reports. Thank you.

Product Firefox Release Channel release Version 73.0.1

Thu, 20 Feb 2020 19:26:07 GMT bp-61f50fe9-dab0-4664-aa94-f8ce60200220

Sun, 23 Feb 2020 05:45:31 GMT bp-5e9bb4ea-32fe-42b7-98c3-a99250200224

Signature: shutdownhang | __psynch_cvwait | <name omitted> | BaseAllocator::malloc | .str.1.llvm.15387763671412248588

MOZ_CRASH Reason (Sanitized) : MOZ_CRASH(Shutdown hanging before starting.)

Crash Reason EXC_BAD_ACCESS / KERN_INVALID_ADDRESS ++++++++++++++++++++++++++++++++++++++++++ bp-036cb932-2256-4827-90a9-4b8bd1180212 Crash Report Not Found

Let’s do a full clean re-install;

Note: Firefox comes in three or more folders on all computers. They are;

Maintenance: (Programs Folder) <Windows Only> Firefox itself: (Programs Folder) And two folders in the profile of each user on the computer for each Firefox profile for that user.

If you remove the Firefox folder, the user profiles would not be affected.

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) Note: Check Both Folders

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 any profile folders.

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

It seems as though Catalina does not want Firefox on my iMac.

First, I couldn't even download Firefox from the Firefox website. I tried the English version 10 times but it would never fully download and just hangs at 69.3MB which is the size of the file but it never competes the process. I then tried the Canadian English version and that worked. Then I tried English version again and it finally worked but only right after I did the Canadian English version.

But when I go to install the English Firefox version, I drag it over to the applications folder it never copies. It says copying and never does even if you wait for several hours it stays with the circle showing progress at no progress. I tried it 10 different times on fresh reboots, etc. But Firefox just won't copy to my applications folder or any folder. I then have to force quit Finder and move the Firefox icon that shows no progress copied to the trash then empty trash, which then crashes the trash when I try to empty Firefox from it. So I have to force quit trash and then Firefox is not in the trash. Then we start the cycle again.

If I click on control and eject it says it can't because it is in use.

The last curious item is that no matter when I download Firefox it says 2/17/20 and not todays date.

Any ideas?

Thank you!

I called for more help.

FredMcD said

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

You may have ad/mal-ware. Further information can be found in this article; https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-caused-malware?cache=no

Run most or all of the listed malware scanners. Each works differently. If one program misses something, another may pick it up.

Hi BLINK:

I use OS XCatalina on two Macs with Firefox 73 and have no issues. My guess is you have malware or some other low level software or hardware issue? I'd recommend scanning with Mac anti-malware software such as Malware bytes: https://www.macworld.com/article/3263722/best-antivirus-for-mac.html

Cheers!

...Roland