1058594 - [e10s] 'Screengrab (fix version)' addon does not work

Status: RESOLVED FIXED

(Firefox :: Extension Compatibility, defect)

Description

[renault.herve]

The Screengrab! addon is a screenshot utility.

It does not work at all (nothing happens) when e10s is enabled as specified on https://groups.google.com/forum/#!msg/mozilla.dev.platform/XgIfiGmebLs/Hu-wFWTmhg0J

Comment 1

[Loic]

Link to the add-on on AMO, please.

Comment 2

[Chris Peterson [:cpeterson]]

Renault: are you using "Screengrab (fix version)" (version 0.97.26c) add-on? That add-on is a fork of an older unsupported add-on also called "Screengrab".

https://addons.mozilla.org/en-US/firefox/addon/screengrab-fix-version

Comment 3

[renault.herve]

Indeed, it's https://addons.mozilla.org/fr/firefox/addon/screengrab-fix-version/

Comment 4

[Jorge Villalobos [:jorgev] (he/him)]

The developer has been contacted through AMO.

Comment 5

[Oleksandr]

I know about this problem and has already reported about her via:
https://input.mozilla.org/en-US/feedback/firefox/36.0a1/?utm_source=tab&utm_campaign=e10sfeedback

until the problem is solved in the current version of the file install.rdf I registered this:
<em:multiprocessCompatible>false</em:multiprocessCompatible>

about problem:

test code:

var canvas = document.createElementNS("http://www.w3.org/1999/xhtml", "html:canvas");
var context = canvas.getContext("2d");
var win = window.top.getBrowser().selectedBrowser.contentWindow;
alert(win); // e10s disabled == [object Window]; e10s enabled == [object CPOW [object Window]]
try {
   context.drawWindow(win, 0, 0, 100, 100, "#ffffff");
   alert('ok');
} catch(e) {
   alert(e);
}

if e10s is enabled - Error:
TypeError: Argument 1 of CanvasRenderingContext2D.drawWindow does not implement interface Window.

Comment 6

[Oleksandr]

I solved this problem

change:
var canvas = document.createElementNS("http://www.w3.org/1999/xhtml", "html:canvas");
to:
var canvas = win.document.createElementNS("http://www.w3.org/1999/xhtml", "html:canvas");

please update screengrab, version 0.98.04c
https://addons.mozilla.org/addon/screengrab-fix-version/versions/

!!!!!!!!!!!!!!!!!!!
but I've found a new problem in E10S
!!!!!!!!!!!!!!!!!!!
https://developer.mozilla.org/en-US/Add-ons/Code_snippets/Post_data_to_window

post data not working when enabled E10S!

Comment 7

[Jorge Villalobos [:jorgev] (he/him)]

This add-on seems to be working correctly on Nightly now.