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?

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 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

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

bp-a8ce7052-6241-47b9-b2cd-1735a0180330.txt bp-adda00f1-fc82-4fb4-b5cc-322b01180323.txt bp-b4b32f91-dc0f-4606-9721-529e81180328.txt bp-ba8c035c-8c60-4cec-b67a-876a20180402.txt bp-cae9c73a-2d97-4a8c-87cc-61df60180416.txt bp-d63780e0-7aff-4ac4-8b48-c3bac0180328.txt bp-e9945239-2a1f-4aa6-b8d7-7fc0a0180416.txt bp-edc4ed25-0039-475e-bbf1-977382151008.txt bp-fa78e5c7-5ec4-478c-832b-ff0d70180416.txt

Product Firefox Release Channel release Version 58.0.2 Build ID 20180206200532 OS OS X 10.10 OS Version 10.10.5 14F2511

bp-a8ce7052-6241-47b9-b2cd-1735a0180330 bp-ba8c035c-8c60-4cec-b67a-876a20180402

Signature: nsTSubstring<T>::Assign

This is for Sumo's Related Bugs 1419432 RESOLVED WORKSFORME Crashes at 0x100 (Mac, Linux) or 0x10101 (Windows) in strlen | nsTSubString<char>::Assign | ContentProcess::Init reading past end of mozilla::dom::ContentPrefs::gInitPrefs

1407751 You are not authorized to access bug 1407751 ++++++++++++++++++++++++++++++++++++++++++++++++ bp-adda00f1-fc82-4fb4-b5cc-322b01180323 Signature: nsDOMWindowUtils::GetVisitedDependentComputedStyle +++++++++++++++++++++++++++++++++++++++++++++++++ bp-b4b32f91-dc0f-4606-9721-529e81180328 Signature: nsTSubstring<T>::SetCapacity

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 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