Firefox continues to say it is not the default browser

I have removed all browsers other than firefox but I keep getting the message that Firefox is not the default browser when I start up firefox.

Under preferred applications the Firefox browser is selected. the version of firefox is 82.0.3 as of Nov-15-2020

Hi there :slight_smile:

Give this a try :

I have read the description provided but i am unclear. Since I have no browser installed is this a Firefox problem or Ubuntu?

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Is it the firefox installation that comes with UM ?

What is the output of this command ?

$ whereis firefox
    firefox: /usr/bin/firefox /usr/lib/firefox /etc/firefox /usr/share/man/man1/firefox.1.gz

Can you run firefox: /usr/bin/firefox from terminal to see if the problem persists ?

I assume you already went to Edit/Preferences/General/Startup and selected Firefox as your default browser?

Firefox exists and runs on the system. Firefox is the default and I believe the issue is Firefox as it is slowing system resources graphically and I caught it performing an update without me performing a "software update"

I have open a case with mozilla as this is not Ubuntu issue sinc no other browser is running.

@bunnion, is that firefox from default install or at any time you manually installed it? If so, was it a snap package or downloaded it straight from firefox site? May be you can share screenshot of 'About Firefox' window? Or the output of following.

dpkg -l | grep firefox
snap list | grep firefox

I'm asking because, I see firefox snap version is 82.0.3 whereas deb package is 83. Following is status on my PC.

(base) [email protected]:~$ dpkg -l | grep firefox
ii  firefox                                       83.0+build2-0ubuntu1                amd64        Safe and easy web browser from Mozilla
ii  firefox-locale-en                             83.0+build2-0ubuntu1                amd64        English language pack for Firefox
(base) [email protected]:~$ snap list | grep firefox
(base) [email protected]:~$ snap search firefox
Name                 Version        Publisher       Notes  Summary
firefox              82.0.3-1       mozilla*        -      Mozilla Firefox web browser

If so, unless you want non system-provided pacakge, remove the other instance and install from official repo and see if it fixes the issue.

If that is not the case, you could try two things.

  • See if there are still browser folders for the browsers you removed inside your .config directory (or snap directory for chromium) that may have some configuration still overriding? If so, you could delete those directories and see if that helps.
  • take a look at 'Welcome' application's 'Browser Selection' to see if there is anything not set correctly. May be you have to click on 'Make default' for firefox again?
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