Bug#844238: firefox-esr segmentation fault on startup

[bw123]

Package: firefox-esr
Version: 45.4.0esr-1~deb8u2
Severity: important

Dear Maintainer,

Just browsing this morning, with 2 or 3 tabs open like always, browser crashed and now stuck.  

Browser will start in safe mode, then crashes consistently after one minute.
$ time firefox-esr -safe-mode
Segmentation fault

real    1m2.573s
user    0m14.260s
sys     0m1.060s

I have turned off a LOT of "features" through about:config and the /etc/firefox-esr/firefox-esr.js attached.

Three addons are installed, don't see that attached so here's the info
i     xul-ext-adblock-plus                                              2.7.3+dfsg-1~d 2.7.3+dfsg-1~d
i     xul-ext-adblock-plus-element-hiding-helper                        1.3-1          1.3-1
i     xul-ext-noscript 

I have these entries in /etc/hosts but commenting out the hosts entries doesn't change the behavior.

#noscript?
127.0.0.1 secure.informaction.com

# mozilla browser garbage
127.0.0.1 location.services.mozilla.com
127.0.0.1 tiles.services.mozilla.com
127.0.0.1 services.addons.mozilla.org
127.0.0.1 versioncheck-bg.addons.mozilla.org
127.0.0.1 addons.mozilla.org

I'll try as another user, can't run debugger through firefox-esr-dbg as suggested.  I'm on very limited 
bandwidth for the month, and packages aren't installed.

-- Package-specific info:


-- Addons package information

-- System Information:
Debian Release: 8.6
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.16.0-4-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.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               4.4+b1
ii  fontconfig                2.11.0-6.3+deb8u1
ii  libasound2                1.0.28-1
ii  libatk1.0-0               2.14.0-1
ii  libc6                     2.19-18+deb8u6
ii  libcairo2                 1.14.0-2.1+deb8u1
ii  libdbus-1-3               1.8.20-0+deb8u1
ii  libdbus-glib-1-2          0.102-1
ii  libevent-2.0-5            2.0.21-stable-2
ii  libffi6                   3.1-2+b2
ii  libfontconfig1            2.11.0-6.3+deb8u1
ii  libfreetype6              2.5.2-3+deb8u1
ii  libgcc1                   1:4.9.2-10
ii  libgdk-pixbuf2.0-0        2.31.1-2+deb8u5
ii  libglib2.0-0              2.42.1-1+b1
ii  libgtk2.0-0               2.24.25-3+deb8u1
ii  libhunspell-1.3-0         1.3.3-3
ii  libpango-1.0-0            1.36.8-3
ii  libsqlite3-0              3.8.7.1-1+deb8u2
ii  libstartup-notification0  0.12-4
ii  libstdc++6                4.9.2-10
ii  libx11-6                  2:1.6.2-3
ii  libxcomposite1            1:0.4.4-1
ii  libxdamage1               1:1.1.4-2+b1
ii  libxext6                  2:1.3.3-1
ii  libxfixes3                1:5.0.1-2+b2
ii  libxrender1               1:0.9.8-1+b1
ii  libxt6                    1:1.1.4-1+b1
ii  procps                    2:3.3.9-9
ii  zlib1g                    1:1.2.8.dfsg-2+b1

Versions of packages firefox-esr recommends:
pn  gstreamer1.0-libav         <none>
ii  gstreamer1.0-plugins-good  1.4.4-2

Versions of packages firefox-esr suggests:
pn  fonts-lmodern          <none>
pn  fonts-stix | otf-stix  <none>
ii  libcanberra0           0.30-2.1
pn  libgnomeui-0           <none>
ii  libgssapi-krb5-2       1.12.1+dfsg-19+deb8u2
pn  mozplugger             <none>

-- Configuration Files:
/etc/firefox-esr/firefox-esr.js changed:
// This is the Debian specific preferences file for Firefox ESR
// You can make any change in here, it is the purpose of this file.
// You can, with this file and all files present in the
// /etc/firefox-esr directory, override any preference you can see in
// about:config.
//
// Note that lockPref is allowed in these preferences files if you
// don't want users to be able to override some preferences.
// bw added these
pref("app.update.auto", false);
pref("extensions.blocklist.enabled", false);
pref("extensions.getAddons.cache.enabled", false);
pref("extensions.update.autoUpdateDefault", false);
pref("extensions.update.enabled", false);
pref("browser.aboutHomeSnippets.updateUrl", "");
pref("browser.casting.enabled", false);
pref("browser.newtabpage.directory.ping", "");
pref("browser.newtabpage.directory.source", "");
pref("browser.newtabpage.enhanced", false);
pref("browser.search.geoip.url", "");
pref("browser.search.update", false);
pref("browser.selfsupport.url", "");
pref("browser.safebrowsing.malware.reportURL", "");
pref("browser.safebrowsing.updateURL", "");
pref("browser.safebrowsing.enabled", false);
pref("browser.safebrowsing.downloads.remote.enabled", false);
pref("browser.search.suggest.enabled", false);
pref("browser.startup.homepage_override.mstone", "ignore");
pref("browser.urlbar.autocomplete.enabled", false);
pref("browser.urlbar.suggest.bookmark", false);
pref("browser.urlbar.suggest.history", false);
pref("browser.urlbar.suggest.openpage", false);
pref("javascript.enabled", false);
pref("lightweightThemes.update.enabled", false);
pref("media.peerconnection.enabled", false);
pref("network.http.speculative-parallel-limit", 0);
pref("network.dns.disablePrefetch", true);
pref("network.prefetch-next", false);
pref("network.dns.disablePrefetchFromHTTPS", true);
pref("privacy.trackingprotection.pbmode.enabled", false)
pref("security.OCSP.enabled", 0);
pref("toolkit.telemetry.reportingpolicy.firstRun", false);
// end bw
//pref("extensions.update.enabled", true);
// Use LANG environment variable to choose locale
pref("intl.locale.matchOS", true);
// Disable default browser checking.
pref("browser.shell.checkDefaultBrowser", false);
// Avoid openh264 being downloaded.
pref("media.gmp-manager.url.override", "data:text/plain,");
// Disable openh264.
pref("media.gmp-gmpopenh264.enabled", false);
// Default to classic view for about:newtab
sticky_pref("browser.newtabpage.enhanced", false);
// Disable health report upload
pref("datareporting.healthreport.uploadEnabled", false);


-- no debconf information