Bug#875643: firefox-esr: Can't specify external viewer like /usr/bin/emacsclient

[Stefan]

Package: firefox-esr
Version: 52.3.0esr-2
Severity: normal

Dear Maintainer,

In older versions of Firefox, the dialog box which asked me whether
I want to downoload the file or pass it to some external viewer
let me choose the viewer via a file-selector, so I could very easily
specify a viewer such as /usr/bin/emacsclient.

Now I can't see to be able to do this any more.  All I can do is choose
among a bunch of applications listed with their icons, emacsclient
is not among them and I can't see any way to specify the application
I want by giving its full file name.  This severely restricts the
choice of external viewer for some file types.


	Stefan


-- Package-specific info:

-- Extensions information
Name: Adblock Plus
Location: ${PROFILE_EXTENSIONS}/{d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}.xpi
Status: enabled

Name: Application Update Service Helper
Location: ${PROFILE_EXTENSIONS}/aushelper at mozilla.org.xpi
Status: enabled

Name: BetterPrivacy
Location: ${PROFILE_EXTENSIONS}/{d40f5e7b-d2cf-4856-b441-cc613eeffbe3}.xpi
Status: enabled

Name: Default theme
Location: /usr/lib/firefox-esr/browser/extensions/{972ce4c6-7e08-4474-a285-3208198ce6fd}.xpi
Package: firefox-esr
Status: enabled

Name: Extension Download manager tweak
Location: ${PROFILE_EXTENSIONS}/{F8A55C97-3DB6-4961-A81D-0DE0080E53CB}.xpi
Status: enabled

Name: Firemacs
Location: ${PROFILE_EXTENSIONS}/{e98b7313-167d-48c6-89be-bc514d6de8d9}.xpi
Status: enabled

Name: Multi-process staged rollout
Location: ${PROFILE_EXTENSIONS}/e10srollout at mozilla.org.xpi
Status: enabled

Name: Pocket
Location: ${PROFILE_EXTENSIONS}/firefox at getpocket.com.xpi
Status: enabled

Name: UAControl
Location: ${PROFILE_EXTENSIONS}/uacontrol at qz.tsugumi.org.xpi
Status: enabled

Name: Web Compat
Location: ${PROFILE_EXTENSIONS}/webcompat at mozilla.org.xpi
Status: enabled

-- Plugins information
Name: GNOME Shell Integration
Location: /usr/lib/mozilla/plugins/libgnome-shell-browser-plugin.so
Package: gnome-shell
Status: enabled

Name: iTunes Application Detector
Location: /usr/lib/mozilla/plugins/librhythmbox-itms-detection-plugin.so
Package: rhythmbox-plugins
Status: enabled

Name: Shockwave Flash
Location: /usr/lib/gnash/libgnashplugin.so
Package: browser-plugin-gnash
Status: disabled


-- Addons package information
ii  browser-plugin 0.8.11~git20 i386         GNU Shockwave Flash (SWF) player 
ii  firefox-esr    52.3.0esr-2  i386         Mozilla Firefox web browser - Ext
ii  gnome-shell    3.22.3-3     i386         graphical shell for the GNOME des
ii  rhythmbox-plug 3.4.1-3      i386         plugins for rhythmbox music playe

-- System Information:
Debian Release: buster/sid
  APT prefers testing
  APT policy: (990, 'testing'), (50, 'stable')
Architecture: i386 (x86_64)

Kernel: Linux 3.16.0-4-amd64 (SMP w/2 CPU cores)
Locale: LANG=fr_CH.UTF-8, LC_CTYPE=fr_CH.UTF-8 (charmap=UTF-8), LANGUAGE=fr_CH.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages firefox-esr depends on:
ii  debianutils               4.8.2
ii  fontconfig                2.12.3-0.2
ii  libasound2                1.1.3-5
ii  libatk1.0-0               2.24.0-1
ii  libc6                     2.24-17
ii  libcairo-gobject2         1.14.10-1
ii  libcairo2                 1.14.10-1
ii  libdbus-1-3               1.11.16+really1.10.22-1
ii  libdbus-glib-1-2          0.108-2
ii  libevent-2.1-6            2.1.8-stable-4
ii  libffi6                   3.2.1-6
ii  libfontconfig1            2.12.3-0.2
ii  libfreetype6              2.8-0.2
ii  libgcc1                   1:7.2.0-4
ii  libgdk-pixbuf2.0-0        2.36.5-2
ii  libglib2.0-0              2.53.6-1
ii  libgtk-3-0                3.22.19-1
ii  libgtk2.0-0               2.24.31-2
ii  libhunspell-1.6-0         1.6.1-2
ii  libjsoncpp1               1.7.4-3
ii  libnspr4                  2:4.16-1
ii  libnss3                   2:3.32-2
ii  libpango-1.0-0            1.40.11-1
ii  libsqlite3-0              3.20.1-1
ii  libstartup-notification0  0.12-4+b2
ii  libstdc++6                7.2.0-4
ii  libvpx4                   1.6.1-3
ii  libx11-6                  2:1.6.4-3
ii  libx11-xcb1               2:1.6.4-3
ii  libxcb-shm0               1.12-1
ii  libxcb1                   1.12-1
ii  libxcomposite1            1:0.4.4-2
ii  libxdamage1               1:1.1.4-3
ii  libxext6                  2:1.3.3-1+b2
ii  libxfixes3                1:5.0.3-1
ii  libxrender1               1:0.9.10-1
ii  libxt6                    1:1.1.5-1
ii  procps                    2:3.3.12-3
ii  zlib1g                    1:1.2.8.dfsg-5

firefox-esr recommends no packages.

Versions of packages firefox-esr suggests:
ii  fonts-lmodern          2.004.5-3
ii  fonts-stix [otf-stix]  1.1.1-4
ii  libcanberra0           0.30-3
ii  libgssapi-krb5-2       1.15.1-2
pn  mozplugger             <none>

-- no debconf information