Currently I have Ubuntu 16.04.10 32 bit and Firefox Quantum 57.0.4 (32-bit). When I open some websites, they show that browser is critically out of date. I tried to update/install Firefox via command line but the version remains the same. How to run the newest browser on Ubuntu 16.04.10 32 bit? Is Firefox 32bit still supported or should switch to 64bit?

Output of cat /etc/apt/sources.list:

deb http://ubuntu-archive.mirror.serveriai.lt/ xenial restricted universe main multiverse
deb [arch=amd64,i386] https://deb.opera.com/opera-stable/ stable non-free
# deb-src [arch=amd64,i386] https://deb.opera.com/opera-stable/ stable non-free

Output of lsb_release -a:

No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 16.04.3 LTS
Release:    16.04
Codename:   xenial
  • What is the output of lsb_release -a; cat /etc/apt/sources.list?
    – Kulfy
    Mar 24, 2019 at 19:37
  • Updated the post.
    – Justas
    Mar 24, 2019 at 19:37
  • 1
    You should reset repository list, as it doesn't work. askubuntu.com/questions/124017/… Mar 24, 2019 at 21:51
  • It worked. Thanks!
    – Justas
    Mar 25, 2019 at 23:09

1 Answer 1


Your Ubuntu is running 16.04.3 which was released way back in August '17 while the latest point release is 16.04.6 released in February '19. Also, it seems that your Ubuntu's repository information is also outdated due to which you can't update Firefox. To update repository information, run:

sudo apt update

Then to update Firefox:

sudo apt upgrade firefox

To upgrade the system to 16.04.6:

sudo apt upgrade
  • Thanks but it shows the same Firefox version after executing these commands.
    – Justas
    Mar 24, 2019 at 20:56
  • @Justas Try changing the server from Software and updates app.
    – Kulfy
    Mar 24, 2019 at 20:58
  • Tried, shows that is already up to date and the same old version.
    – Justas
    Mar 24, 2019 at 21:43
  • @Justas What is the output of cat /etc/apt/sources.list now?
    – Kulfy
    Mar 25, 2019 at 14:10
  • It worked after resetting repository list as it is mentioned the comment below question.
    – Justas
    Mar 25, 2019 at 23:09

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