firefox cannot connect to any website, other browsers can?

[Karl Auer]

On Thu, 2022-01-13 at 09:48 +0100, M. Fioretti wrote:
> I am running Firefox 95.01. on an Ubuntu 21.04 64-bit box. All of a
> sudden, for no visible reason, Firefox stopped connecting to any
> website, including some that are surely online, e.g. cnn.com, google,
> etc..
> 

Using some means still available to you, find out the IP address of a
suitable test target. For example:

kauer at kt1:~$ dig +short www.google.com
142.250.66.196

Put that IP address into the Firefox location bar, with "https://" in
front of it, i.e., "https://142.250.66.196"

Hit "ENTER" and see if Google appears. If it does (probably after a
certificate warning), you have a DNS problem. It may or may not be
unique to Firefox.

If this test has the same result as using "www.google.com" in the
location bar, then Firefox may really have a problem.

Do this test and let us know. No point theorising more at this point.

Regards, K.

-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Karl Auer (kauer at biplane.com.au)
http://www.biplane.com.au/kauer

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