Hi Mario, Both passed the testing for compatibility. Can you please try Firefox Safe Mode to make sure its not the add on: Try Firefox Safe Mode to see if the problem goes away. Firefox Safe Mode is a troubleshooting mode that temporarily turns off hardware acceleration, resets some settings, and disables add-ons (extensions and themes).

If Firefox is open, you can restart in Firefox Safe Mode from the Help menu:

• Click the menu button , click Help and select Restart with Add-ons Disabled.

If Firefox is not running, you can start Firefox in Safe Mode as follows:

• On Windows: Hold the Shift key when you open the Firefox desktop or Start menu shortcut.
• On Mac: Hold the option key while starting Firefox.
• On Linux: Quit Firefox, go to your Terminal and run firefox -safe-mode
  (you may need to specify the Firefox installation path e.g. /usr/lib/firefox)

When the Firefox Safe Mode window appears, select "Start in Safe Mode".

If the issue is not present in Firefox Safe Mode, your problem is probably caused by an extension, theme, or hardware acceleration. Please follow the steps in the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article to find the cause.

To exit Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.

When you figure out what's causing your issues, please let us know. It might help others with the same problem.

Does the "built-in" method of taking a screenshot work? It's a bit inconvenient by Windows standards, but maybe it's a reasonable temporary workaround. Please see cor-el's post here:

https://support.mozilla.org/questions/1053009#answer-706495

Is it your computer crashing, or Firefox? Can you post what the crash messages are?

jscher2000 said

Does the "built-in" method of taking a screenshot work? It's a bit inconvenient by Windows standards, but maybe it's a reasonable temporary workaround. Please see cor-el's post here: https://support.mozilla.org/questions/1053009#answer-706495

Actually, I tried screenshot --fullpage fullpage_screenshot.png and machine crashed. (without --fullpage, everything seems to work ok).

your advise is welcome m.

FredMcD said

Is it your computer crashing, or Firefox? Can you post what the crash messages are?

I guess Gnome crashes. Which message?

guigs2 said

Can you please try Firefox Safe Mode to make sure its not the add on:

Firefox Safe Mode Developer Toolbar commands (Shift+F2) screenshot --fullpage fullpage_screenshot.png machine crashes.

CORRECTION: machine DOES NOT crash when /etc/X11/xorg.conf.d/10-intel.conf below is moved to trash bin (but other issue about black windows shows up again).

Notes: box Preferences/Advanced/'Uncheck Use hardware acceleration when available' is -Un-checked

There is a file

/etc/X11/xorg.conf.d/10-intel.conf

whose content is

   Section "Device"
      Identifier "Intel Graphics"
      Driver "intel"
      Option "AccelMethod" "sna"
   EndSection

mario60 said

FredMcD said

Is it your computer crashing, or Firefox? Can you post what the crash messages are?

I guess Gnome crashes. Which message?

All of them.

FredMcD said

mario60 said

FredMcD said

Is it your computer crashing, or Firefox? Can you post what the crash messages are?

I guess Gnome crashes. Which message?

All of them.

which ones?

Note correction above. Now I would say that it is not a issue with any add-ons, rather there is something wrong with command screenshot --fullpage and having 10-intel.conf as above.

Your advise is welcome mario

EDIT (SOLVED??)

I am trying with /etc/X11/xorg.conf.d/10-intel.conf as

   Section "Device"
      Identifier "Intel Graphics"
      Driver "intel"
      Option "AccelMethod" "uxa"
   EndSection

and it seems to work, though I seem to remember that there was some other issue. I keep you updated.