Package: firefox-esr
Version: 60.5.1esr-1~deb9u1
Severity: normal

How to reproduce:
- Set in about: config "privacy.resistFingerprinting;true" and
"extensions.screenshots.disabled;false"
- Try to capture a screenshot by pressing "take a screenshot" from the
three dots menu
- The canvas block will stop the capture and asks if you want to enable
canvas on this page
This seems related to 
https://bugzilla.mozilla.org/show_bug.cgi?id=1412418
https://github.com/mozilla-services/screenshots/issues/3691
https://github.com/uBlockOrigin/uBlock-issues/issues/32
Please bump the esr release to the next one (if there is) asap

--- System information. ---
Architecture: 
Kernel:       Linux 4.9.0-5-amd64

Debian Release: 9.8
  500 stable-updates  deb.debian.org 
  500 stable          security.debian.org 
  500 stable          repo.skype.com 
  500 stable          dl.google.com 
  500 stable          deb.debian.org 
  500 newstable       deb.i2p2.de 
  100 stretch-backports deb.debian.org 

--- Package information. ---
Depends                           (Version) | Installed
===========================================-+-===============
libasound2                      (>= 1.0.16) | 
libatk1.0-0                     (>= 1.12.4) | 
libc6                             (>= 2.18) | 
libcairo-gobject2               (>= 1.10.0) | 
libcairo2                       (>= 1.10.0) | 
libdbus-1-3                     (>= 1.9.14) | 
libdbus-glib-1-2                  (>= 0.78) | 
libffi6                          (>= 3.0.4) | 
libfontconfig1                    (>= 2.11) | 
libfreetype6                     (>= 2.2.1) | 
libgcc1                          (>= 1:4.2) | 
libgdk-pixbuf2.0-0              (>= 2.22.0) | 
libglib2.0-0                    (>= 2.31.8) | 
libgtk-3-0                       (>= 3.0.0) | 
libjsoncpp1                      (>= 1.7.4) | 
libpango-1.0-0                  (>= 1.14.0) | 
libstartup-notification0           (>= 0.8) | 
libstdc++6                           (>= 6) | 
libvpx4                          (>= 1.6.0) | 
libx11-6                                    | 
libx11-xcb1                                 | 
libxcb-shm0                                 | 
libxcb1                                     | 
libxcomposite1                 (>= 1:0.3-1) | 
libxdamage1                      (>= 1:1.1) | 
libxext6                                    | 
libxfixes3                                  | 
libxrender1                                 | 
libxt6                                      | 
zlib1g                       (>= 1:1.2.3.4) | 
fontconfig                                  | 
procps                                      | 
debianutils                       (>= 1.16) | 


Recommends              (Version) | Installed
=================================-+-===========
libavcodec58                      | 
 OR libavcodec-extra58            | 
 OR libavcodec57                  | 
 OR libavcodec-extra57            | 7:3.2.12-1~deb9u1
 OR libavcodec56                  | 
 OR libavcodec-extra56            | 
 OR libavcodec55                  | 
 OR libavcodec-extra55            | 
 OR libavcodec54                  | 
 OR libavcodec-extra54            | 
 OR libavcodec53                  | 
 OR libavcodec-extra53            | 


Suggests              (Version) | Installed
===============================-+-===========
fonts-stix                      | 1.1.1-4
 OR otf-stix                    | 
fonts-lmodern                   | 2.004.5-3
libgssapi-krb5-2                | 
 OR libkrb53                    | 
libcanberra0                    | 
libgtk2.0-0                     | 
pulseaudio                      | 



--- Output from package bug script ---


-- Addons package information

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