On 22/05/2019 12:01, Mick Ab wrote: > The following was done to try to install firefox-esr in Jessie :-
> apt update
> apt install firefox-esr
> However, the command "firefox-esr" is not known.
> When I try "firefox", it doesn't work because it claims it is already
> running, which is not true, but Iceweasel is running
> (and I wish to retain this at the moment) so it is equating Firefox with
> Iceweasel whereas I'd understood that they were
Apologies for replying twice to the same enquiry, but I might be able to
provide slightly more information.
Iceweasel and Firefox are not independent packages in Jessie. If you do
"apt-cache show iceweasel" you get the following:
Maintainer: Maintainers of Mozilla-related packages
Description-en: Web browser based on Firefox - Transitional package
This is a transitional package, it can be safely removed.
Note that it depends on firefox-esr. If you install Iceweasel, what you
actually get is Firefox.
All you're doing by explicitly installing firefox-esr is setting it to
being manually installed rather than pulled in by implication.
The firefox-esr package includes both firefox and firefox-esr
executables so I'm not sure why firefox-esr is not working for you.
The iceweasel package seems to include just a linking command, so you
can still invoke firefox as iceweasel.
Your assumption is wrong - they are not separate.
> Both need to run at the same time for various reasons.
As has been asked several times, why? What do you think it will achieve?
> Hence this is why firefox-esr could not be installed on the
> Jessie system as iceweasel was already installed.
A slightly odd way of putting it. The reality is that if you ask to
install iceweasel, what is actually installed is firefox-esr, plus some
linking bits so you can invoke it as "iceweasel".
The reason you can't install firefox-esr after installing iceweasel is
that it is already installed. Under the skin they are the same program.