Bug#878944: firefox: Pop-up prefs error on startup

[Phil Dibowitz]

Package: firefox
Version: 57.0~b6-1
Severity: normal

Dear Maintainer,

[yes I know I'm using experiemental, but I figured it was worth passing
this along anyway]

Just upgraded to 57.0~b6-1 and when I start FF I get a dialog with:

```
[Exception... "Could not convert JavaScript argument arg 0 [nsISupports.QueryInterface]"  nsresult: "0x80570009 (NS_ERROR_XPC_BAD_CONVERT_JS)"  location: "JS frame :: resource://cck2/Preferences.jsm :: get _prefSvc :: line 544"  data: no]

get _prefSvc at resource://cck2/Preferences.jsm:544:19
_get at resource://cck2/Preferences.jsm:87:1
get at resource://cck2/Preferences.jsm:81:12
init at resource://cck2/CCK2.jsm:149:25
@cck2.cfg:134:1
```

Clicking OK lets FF start up and it seems to operate just fine, so it's
not a show-stopper for me, but I wanted to pass it along.

I imagine there's some preference either from history or from a plugin
the new version doesn't like, or maybe this beta build is missing
something.

Thanks for packaging FF!

-- Package-specific info:


-- Addons package information

-- System Information:
Debian Release: buster/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.12.0-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages firefox depends on:
ii  debianutils               4.8.2
ii  fontconfig                2.12.3-0.2
ii  libatk1.0-0               2.26.0-2
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+really1.10.24-1
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                   1:7.2.0-8
ii  libgdk-pixbuf2.0-0        2.36.10-2
ii  libglib2.0-0              2.54.1-1
ii  libgtk-3-0                3.22.22-1
ii  libgtk2.0-0               2.24.31-2
ii  libhunspell-1.6-0         1.6.2-1
ii  libjsoncpp1               1.7.4-3
ii  libnspr4                  2:4.16-1
ii  libnss3                   2:3.33-1
ii  libpango-1.0-0            1.40.12-1
ii  libsqlite3-0              3.20.1-1
ii  libstartup-notification0  0.12-4+b2
ii  libstdc++6                7.2.0-8
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 recommends no packages.

Versions of packages firefox suggests:
pn  fonts-lmodern          <none>
pn  fonts-stix | otf-stix  <none>
ii  libcanberra0           0.30-3
ii  libgssapi-krb5-2       1.15.1-2
pn  mozplugger             <none>

-- no debconf information