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I have recently installed Ubuntu on my old PC. After first boot, Firefox worked fine but later the app opens but the window doesn’t appear. The close and the enlarge function works. I tried installing Falkon and Opera. Falkon doesn't load while Opera turns into a black window and the close/enlarge button is working. At present a lightweight Netscape browser is functioning. My PC does not have a graphics card installed. I have installed Ubuntu to start learning Python.

This is the info that I get from terminal when I try to launch Firefox.

arun@arun-HCL-Desktop:~$ firefox
update.go:85: cannot change mount namespace according to change mount (/var/lib/snapd/hostfs/usr/share/gimp/2.0/help /usr/share/gimp/2.0/help none bind,ro 0 0): cannot open directory "/var/lib": permission denied
update.go:85: cannot change mount namespace according to change mount (/var/lib/snapd/hostfs/usr/share/xubuntu-docs /usr/share/xubuntu-docs none bind,ro 0 0): cannot open directory "/var/lib": permission denied
Gtk-Message: 07:19:00.037: Not loading module "atk-bridge": The functionality is provided by GTK natively. Please try to not load it.
[GFX1-]: glxtest: failed to read data from glxtest, we may fallback to software rendering
[GFX1-]: 
No GPUs detected via PCI

Error image when I try to open the app by launching and by pressing Alt+F2:

Please see the error image

The screen starts to flicker when new apps are opened after opening Firefox:

The screen starts to flicker when new apps are opened after opening Firefox.

I tried reinstalling the Snap Store, reinstalling Ubuntu and solutions in this thread.

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  • Thank you @user535733 I have edited my question. May 17, 2023 at 16:45
  • Ubuntu will work very, very slowly in a computer with 1 GB RAM. Use a lightweight operating system like antixlinux.com instead May 17, 2023 at 18:07
  • It is impossible for a computer to have both DDR1 and DDR2 RAM. Which do you have, and how much of it? Also, there is no such thing as an "Intel Pentium Core" processor. Sounds like your computer is much too underpowered/old to be running Ubuntu, regardless.
    – Esther
    May 17, 2023 at 18:16
  • Thank you for the guidance @user535733, have added the output from terminal when I try to run firefox May 18, 2023 at 2:12
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    @karel Thank you for your response. I have installed Ubuntu MATE and the system is functioning properly. Installing the Firefox app as a debian package and purging snap helped. May 20, 2023 at 13:29

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