schermo intero megavideo e youtube

[veero]

Binary package hint: firefox

ciao a tutti. uso ubuntu 10.10 e firefox, e ogni volta che metto lo schermo intero in youtube o megavideo si blocca.
ho cercato a fondo faticosamente e ho trovato solo qua un inizio di soluzione
http://forum.ubuntu-it.org/index.php?topic=422351.0
ma, come al solito, arrivato ad un certo punto, non riesco a risolvere comunque.
nello specifico, nel mio caso, quando nel tread dice
--
sudo su

   echo \"OverrideGPUValidation = 1\" >> /etc/adobe/mms.cfg"
---
qui non so bene cosa devo fare, e quando inserisco quanto qui sopra scritto, il terminale dice permesso negato.
ma non so neanche se è la cosa giusta da fare...

__________________________________ENGLISH________________
 no full screen on youtube or megavideo
i have ubuntu 10.10 and i use firefox, and it crashes everytime i try to set full screen. i only found this esxplaination in italian. it says to check my glxinfo by opening the terminal, and then to right-click on the video, to uncheck hardware acceleration and then to insert in the terminal this code
-sudo mkdir /etc/adobe
and then is

-sudo on

- echo \"OverrideGPUValidation = 1\" >> /etc/adobe/mms.cfg"
but i don't know what's all this and it's not working.

it's really frustrating....

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: firefox 3.6.16+build1+nobinonly-0ubuntu0.10.10.1
ProcVersionSignature: Ubuntu 2.6.35-28.49-generic 2.6.35.11
Uname: Linux 2.6.35-28-generic i686
NonfreeKernelModules: nvidia
Architecture: i386
Date: Sat Apr 2 16:58:41 2011
FirefoxPackages:
 firefox 3.6.16+build1+nobinonly-0ubuntu0.10.10.1
 firefox-gnome-support 3.6.16+build1+nobinonly-0ubuntu0.10.10.1
 firefox-branding 3.6.16+build1+nobinonly-0ubuntu0.10.10.1
 abroswer N/A
 abrowser-branding N/A
InstallationMedia: Ubuntu-Netbook 10.10 "Maverick Meerkat" - Release i386 (20101007)
ProcEnviron:
 LANG=it_IT.utf8
 SHELL=/bin/bash
SourcePackage: firefox

[Robert Roth (evfool)]

We noticed that some of the sentences in this bug report are not in English. If they were translated in English they would be more understandable to triagers. Could you please translate them?

[veero (veero)]

I translated it.

[madbiologist (me-again)]

Is this still occurring on Ubuntu 18.04 "Bionic Beaver" with Firefox 61?

[Launchpad Janitor (janitor)]

[Expired for firefox (Ubuntu) because there has been no activity for 60 days.]