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-591a47c9-b599-48ec-a2f8-8910c0190506 5/6/2019 6:29 PM bp-a0294895-1855-4a00-91af-40b380190506 5/6/2019 6:29 PM bp-0c56b3fd-808b-4e2c-9326-0df8f0190506 5/6/2019 6:29 PM bp-657495b5-21e9-44d8-9e6e-a1ff40190506 5/6/2019 6:29 PM bp-c51602d3-f58e-40ee-b825-875b60190506 5/6/2019 6:29 PM [65.0.1] bp-79d6dd03-dd41-4a38-93a0-4b0c70190506 5/6/2019 6:29 PM [66.0.3]

bp-f9532ac3-a249-4382-8e76-3bd0f0190506 5/6/2019 6:29 PM [66.0.4] bp-f163d379-812c-446e-bb5d-f929f0190506 5/6/2019 6:29 PM bp-afc489b7-1b68-4994-880a-fc91f0190506 5/6/2019 6:29 PM bp-8ff8d6e4-304f-43ea-9d85-37cfc0190506 5/6/2019 6:29 PM

Hi maritov, I'm sorry to hear about this problem.

Have you done a normal shutdown and restart of Windows since this problem began? That is useful to clear file locks, complete any pending updates, and force a fresh load of Windows components.

In the data you shared, there were two crash report links. They both have the same "signature" which seems somewhat rare:

LdrpMapAndSnapDependency

It seems to be related to playing media -- both crashing threads go through the MP4Decoder piece -- for which Firefox depends on Microsoft Media Foundation components. However, I can't tell why it suddenly stopped working normally.

Oh, I didn't notice those new report IDs. The last four are the same as before. Some of the new ones are EMPTY; that's not useful. Two run through plugin-container, so that sounds like an issue with Flash. And the other one involves graphics code. It's difficult to see the pattern.

Do you recall ever needing to disable hardware acceleration (using your graphics card) before?

Could you test in Firefox's Safe Mode? In its Safe Mode, Firefox temporarily deactivates extensions, hardware acceleration, any userChrome.css/userContent.css files, and some other advanced features to help you assess whether these are causing the problem.

If Firefox is not running: Hold down the Shift key when starting Firefox. (On Mac, hold down the option/alt key instead of the Shift key.)

If Firefox is running: You can restart Firefox in Safe Mode using either:

• "3-bar" menu button > "?" Help button > Restart with Add-ons Disabled
• (menu bar) Help menu > Restart with Add-ons Disabled

and OK the restart.

Both scenarios: A small dialog should appear. Click "Start in Safe Mode" (not Refresh).

Any improvement?

Same problem occurs in safe mode. I've had this computer since January--Firefox has crashed maybe 3 times in all of those months until today when the update loaded, when it became constant. Nothing else changed.

Probably the ones you saw are the same because they happened right one after another--I may have even been retrying the same or similar websites. Here are some more: bp-427c7cdd-3f50-4f9e-9aa4-94d180190506 5/6/2019 6:29 PM bp-855c3cd1-e831-4202-ad1b-8e7780190506 5/6/2019 6:29 PM bp-f3ee62b8-36c4-49e7-abda-ed35a0190506 5/6/2019 6:29 PM bp-72f5d230-58fc-4f45-b2d7-74d740190506 bp-a1111ead-c334-4441-ba04-ea2cb0190506 5/6/2019 6:26 PM bp-df4716ca-f33f-4345-8b1c-385f60190506 5/6/2019 6:26 PM bp-f4ebd355-0752-4aad-abef-322620190506 5/6/2019 6:26 PM

All 7 over those are the "LdrpMapAndSnapDependency" signature that comes after calling the MP4Decoder.

Did you already restart Windows?

You may need to reinstall Firefox:

Clean Reinstall

This takes about 5 minutes. It's not about your settings, it's about making sure the program files are clean (no inconsistent or alien code files). As described below, this process does not disturb your existing settings. It's not essential to uninstall Firefox, but you can if you like, saying No to any request about removing personal data.

(A) Download a fresh installer for Firefox to a convenient location:

https://www.mozilla.org/firefox/all/

(B) Exit out of Firefox (if applicable).

If you use Microsoft Office, please change your default browser to Internet Explorer temporarily before the next step.

(C) Using Windows Explorer/My Computer (hold down the Windows key and press E to launch it), right-click > rename the program folder as follows (you might have one or both):

C:\Program Files (x86)\Mozilla Firefox =to=> C:\Program Files (x86)\OldFirefox

C:\Program Files\Mozilla Firefox =to=> C:\Program Files\OldFirefox

(D) Run the installer you downloaded in step (A). It should automatically connect to your existing settings.

Any improvement at your next startup?