Firefox hangs Ubuntu

Asked by Luis M.Jacinto on 2021-04-12

Ubuntu 20.04

Fresh Ubuntu installation clicking in Firebox or Thunderbird icon does not start and hangs Ubuntu
need to switch the computer off with main switch
Need help to fix this.
Thank you

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Is the OS fully updated? You can check with:

sudo apt update
sudo apt full-upgrade

This may help

Luis M.Jacinto (ljacinto) said : #2

Yes was fully updated
Reinstall Firefox but still the some.

If you delete ~/.mozilla then start it does it run OK? I assume you don't use Thunderbird as your email client. If you do then don't run that command and I can give you something more precise.

Luis M.Jacinto (ljacinto) said : #4

Don't use Thunderbird as email client.
After delete the folder click on Firefox icon still hangs Ubuntu.
Reboot Ubuntu and repeat the operation still hangs Ubuntu.

If you run:


From a terminal, is there any output that can show an issue?

What is the output of:

lsb_release -a; uname -a; apt-cache policy firefox


Luis M.Jacinto (ljacinto) said : #6

Run firefox on Terminal it just hang the computer
The Terminal report:
luis@luis-desktop:~$ lsb_release -a; uname -a; apt-cache policy firefox
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.2 LTS
Release: 20.04
Codename: focal
Linux luis-desktop 5.8.0-48-generic #54~20.04.1-Ubuntu SMP Sat Mar 20 13:40:25 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
  Installed: 87.0+build3-0ubuntu0.20.04.2
  Candidate: 87.0+build3-0ubuntu0.20.04.2
  Version table:
 *** 87.0+build3-0ubuntu0.20.04.2 500
        500 focal-updates/main amd64 Packages
        500 focal-security/main amd64 Packages
        100 /var/lib/dpkg/status
     75.0+build3-0ubuntu1 500
        500 focal/main amd64 Packages

If you install a different web browser, is it the same?

Luis M.Jacinto (ljacinto) said : #8

Firefox reinstall and working
I dint want to have a different Browser, I complete remove Firefox (so I thought) and reinstall.
To remove used Synaptic then:

sudo apt install firefox
sudo apt upgrade

Now I have another problem I get two Firefox icons on Show Application (Dash?) if click on
certain one it hangs the computer.
Please let me how how to delete it from Dash it seems there is no Delete on this version of Ubuntu.
Thank you

Installing a different browser was for testing purposes only....

Luis M.Jacinto (ljacinto) said : #10

Thanks actionparsnip, that solved my question.