Open firefox.sh with a text editor at /usr/lib/firefox/firefox.sh or the folder where you installed Firefox 3.5 to.

Right click firefox.sh or run-mozilla.sh pick "Open with Other Application..." from the right click menu.

 

Choose the "Text editor" program in the Open With window. Press Open.



I also like to note that Mozilla seem to changed the name of "firefox.sh" to "run-mozilla.sh" , so if firefox.sh is not in your firefox folder then edit run-mozilla.sh instead or a file with a .sh extension since there is only one .sh file in the Firefox folder

Add the code shown after this sentence to the second line of firefox.sh by opening firefox.sh with a text editor and going to the second line and pasting this code on the 2nd line.