Despite i set up chrome as my default browser (i need some functionality not available in Firefox) some links try to open firefox for open in there a link.
Uninstalling firefox is impossible due to its dependancy from ubuntu-mate-desktop.
Q: How i can avoid to open Firefox in all the case and force MATE to honor the setting in “Preferred Applications”?
Thanks a lot in advance!
That’s weird I have never had an issue like that. I set Chromium as my default browser and haven’t had any issues. Perhaps someone can figure out how to not uninstall Firefox but make it relatively inactive. I think ubuntu mate has tools to control startup that are not command line heavy if your not a power user.
@Tetractys can you provide a very specific test case, to help duplicate it (always recommended when asking for help)? I’ll hazard a guess here, and that’s the best I can do without one (I did recreate it with Pidgin). Check this from the command line (but don’t make a new selection yet, hit ctrl-c):
$ sudo update-alternatives --config x-www-browser
If the default choice is shown as firefox, that could be the issue. In that case you could try selecting the google chrome stable auto option (“0”).
In my case, Preferred Application said Chrome, but the above command showed firefox, and that is what links from Pidgin opened up in.
@gravy45 thank you. this is the output of your suggested command:
davide@thor:~$ sudo update-alternatives --config x-www-browser
[sudo] password for davide:
There are 4 choices for the alternative x-www-browser (providing /usr/bin/x-www-browser).
Selection Path Priority Status
------------------------------------------------------------
* 0 /usr/bin/flashpeak-slimjet 200 auto mode
1 /usr/bin/firefox 40 manual mode
2 /usr/bin/flashpeak-slimjet 200 manual mode
3 /usr/bin/google-chrome-unstable 120 manual mode
4 /usr/bin/vivaldi-preview 0 manual mode
Press enter to keep the current choice[*], or type selection number:
seems ok. i’ll try to reproduce the issue shortly.
n.b.: slimjet is a great implementation of chromium take a look: http://www.slimjet.com/en/
[SOLVED]
The problem was generated by a bad coded chrome app. This app is named “SlackDeck”: https://chrome.google.com/webstore/detail/slackdeck/kpjhcddaofpohlbadnmnnaenmmefdbgn?utm_source=chrome-ntp-icon
Has the “Firefox” call ‘hard coded’. The app doesn’t read which browser is the default one for the user. It will use Firefox.
Uninstalled. I’m using normal web page now 
Thanks to all answered my question!