[Pkg-mozext-maintainers] Bug#879990: Fails to start on first run of Firefox 56

[Josh Triplett]

Package: xul-ext-adblock-plus
Version: 2.9.1+dfsg-1
Severity: important

(Filing as "important" rather than "grave" in case this doesn't happen
for everyone.)

I get the following error on firefox startup, and the Adblock Plus
toolbar item doesn't show up:

1509165898564	addons.xpi	WARN	Exception running bootstrap method startup on {d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}: TypeError: params.webExtension is undefined (file:///usr/share/xul-ext/adblock-plus/bootstrap.js:25:7) JS Stack trace: startup at bootstrap.js:25:7 < callBootstrapMethod at XPIProvider.jsm:4405:11 < startup at XPIProvider.jsm:2239:13 < callProvider at AddonManager.jsm:269:12 < _startProvider at AddonManager.jsm:739:5 < startup at AddonManager.jsm:906:9 < startup at AddonManager.jsm:3090:5 < observe at addonManager.js:65:9

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

Kernel: Linux 4.13.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE=C.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages xul-ext-adblock-plus depends on:
ii  firefox  56.0-2

xul-ext-adblock-plus recommends no packages.

xul-ext-adblock-plus suggests no packages.

-- no debconf information