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replaced http://askubuntu.com/ with https://askubuntu.com/

edited Apr 13, 2017 at 12:22

There are several (unrelated) questions in this, depending on definition of default; and each of those has its own solutions.

for launching in Desktop Environment, browser which will be started is usually specified in Debian alternatives system as stated in question (and is already set to Chromium!).
of course if user has created shortcut to specific app instead of x-www-browser then alternatives won't be used and shortcut need to changed manually according to that DE
for opening from certain programs (like MUAs), attachments will be opened according to mailcap(5), see that manual page how to override for example text/html etc. (See also /etc/mime.types for maping local extensions to MIME types)
some apps will use xdg-open(1) for determining with what to open files.
other apps yet will have its own lists (for example, in Firefox you'll have about:preferences#content URL to configure with what to open some MIME type, in mc you'll have Menu / Command / Edit extension file to determune what happens when you click on .html file etc)
For the Chromium not being the default internet browser message, disable broken check in Menu / Settings / Settings / Default browser or see this question this question

There are several (unrelated) questions in this, depending on definition of default; and each of those has its own solutions.

for launching in Desktop Environment, browser which will be started is usually specified in Debian alternatives system as stated in question (and is already set to Chromium!).
of course if user has created shortcut to specific app instead of x-www-browser then alternatives won't be used and shortcut need to changed manually according to that DE
for opening from certain programs (like MUAs), attachments will be opened according to mailcap(5), see that manual page how to override for example text/html etc. (See also /etc/mime.types for maping local extensions to MIME types)
some apps will use xdg-open(1) for determining with what to open files.
other apps yet will have its own lists (for example, in Firefox you'll have about:preferences#content URL to configure with what to open some MIME type, in mc you'll have Menu / Command / Edit extension file to determune what happens when you click on .html file etc)
For the Chromium not being the default internet browser message, disable broken check in Menu / Settings / Settings / Default browser or see this question

There are several (unrelated) questions in this, depending on definition of default; and each of those has its own solutions.

for launching in Desktop Environment, browser which will be started is usually specified in Debian alternatives system as stated in question (and is already set to Chromium!).
of course if user has created shortcut to specific app instead of x-www-browser then alternatives won't be used and shortcut need to changed manually according to that DE
for opening from certain programs (like MUAs), attachments will be opened according to mailcap(5), see that manual page how to override for example text/html etc. (See also /etc/mime.types for maping local extensions to MIME types)
some apps will use xdg-open(1) for determining with what to open files.
other apps yet will have its own lists (for example, in Firefox you'll have about:preferences#content URL to configure with what to open some MIME type, in mc you'll have Menu / Command / Edit extension file to determune what happens when you click on .html file etc)
For the Chromium not being the default internet browser message, disable broken check in Menu / Settings / Settings / Default browser or see this question

answered Sep 3, 2016 at 14:14

There are several (unrelated) questions in this, depending on definition of default; and each of those has its own solutions.

for launching in Desktop Environment, browser which will be started is usually specified in Debian alternatives system as stated in question (and is already set to Chromium!).
of course if user has created shortcut to specific app instead of x-www-browser then alternatives won't be used and shortcut need to changed manually according to that DE
for opening from certain programs (like MUAs), attachments will be opened according to mailcap(5), see that manual page how to override for example text/html etc. (See also /etc/mime.types for maping local extensions to MIME types)
some apps will use xdg-open(1) for determining with what to open files.
other apps yet will have its own lists (for example, in Firefox you'll have about:preferences#content URL to configure with what to open some MIME type, in mc you'll have Menu / Command / Edit extension file to determune what happens when you click on .html file etc)
For the Chromium not being the default internet browser message, disable broken check in Menu / Settings / Settings / Default browser or see this question