I'm trying to access firefox properties, more specifically the launcher options I'm given following instructions:

Ubuntu (and other GNOME-based distributions):

  1. Click on the Preferences menu and select Main menu. The Main Menu window appears.
  2. Click on the program group called Internet.
  3. Select Firefox Web Browser and click on the Properties button. The Launcher properties window appears.
  4. Insert the string env LD_PRELOAD=/usr/lib/libGL.so.1 before the text specified in the Command field:

However when I click on Firefox Web Browser under the program group called internet it simply opens another window, if I right click on it it also opens another window, where may I find the "properties button"?


Those instructions look like they are for a really old version of Ubuntu using gnome and not unity.

1. Test and see if it will work before making changes to file.

Close up all firefox windows and open up the terminal. Type this command to launch firefox while preloading the libGL.so.1 library

LD_PRELOAD=/usr/lib/libGL.so.1 firefox

Try viewing your flash videos full screen. If it works out, proceed to commit the command to file in the next step. If not, try the other instructions in the tutorial.

2. Commit changes to file.

Open up the terminal and run the following command:

gksu gedit /usr/share/applications/firefox.desktop

This will open gedit in root mode and open up the firefox.desktop file.

Look for this line:

Exec=firefox %u

and change it to:

Exec=env LD_PRELOAD=/usr/lib/libGL.so.1 firefox %u

Log out and log in again.

  • Hi, I'm getting a follower error: sudo: gksu: command not found when I input sudo gksu gedit /usr/share/applications/firefox.desktop – user3550204 Aug 25 '14 at 7:32
  • Ah. That should be either sudo or gksu, not both. Preferably gksudo. Do sudo apt-get install gksu. Then do gksudo gedit /usr/share/applications/firefox.desktop. – muru Aug 25 '14 at 7:40
  • @muru Corrected. – Parto Aug 25 '14 at 7:52

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