1319215 - The "Contre Jour" game does not start

Status: RESOLVED FIXED

(Core :: DOM: CSS Object Model, defect, P3)

Description

[Laurent Bonnaud]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Firefox/52.0
Build ID: 20161121004022

Steps to reproduce:

Go to this site:  http://contrejour.ie/



Actual results:

The game loads but starting to play is impossible.

I tried on Linux with the following firefox versions:
 - release (50)
 - beta 51.0n1
 - aurora 52
 - nightly 53
and all lead to the same result.



Expected results:

Being able to play the game.

Comment 1

[Vlad Bacia-Mociran [:VladB]]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:53.0) Gecko/20100101 Firefox/53.0

I have tested your issue on latest FF release v50.0 and latest Nightly build (Build ID: 20161123030208) and managed to reproduce it. I have followed the steps from comment 0, tried with e10s ON/OFF, HW acceleration ON/OFF, updated flash player to latest beta version for Linux (Flash 24 beta). 
In the Browser Console the following errors are displayed:

- downloadable font: maxp: bad max_zones: 0 (font-family: "HandOfSean" style:normal weight:normal stretch:normal src index:0) source: http://contrejour.ie/fonts/handsean.woff...styles.css:97:1
- Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user’s experience. For more help http://xhr.spec.whatwg.org/...cj.js:1:9188

These errors may be related with something broken in the game code or maybe something unsupported by Firefox.

Also, in the Browser Console I have observed an error related to Libavcodec. After updating the codecs, the error was no longer displayed.

Comment 2

[Xidorn Quan [:xidorn] UTC+11]

After investigating a bit, it feels to me this is a JS engine bug?

It seems it fails to display the element #levelPickerContainer after hiding the first interface. On Chrome, the code path to show that is via a closure inside "hidePlanets" function, which calls "showLevels". The closure looks like this after beautifying:
> function () {
>   a.game.modifyTheme(a.currentChapter),
>   a.game.changeWorld(a.currentChapter),
>   a.showLevels()
> }

However, this function seems to return after the first line is invoked, so the second line "changeWorld" and the third line "showLevels" are never reached. (At least it is what the Debugger shows to me.)

Moving this to JavaScript Engine component to see if anyone has idea how this could happen. Also cc Mike as it seems to be a web compatibility issue which may need further investigation.

Comment 3

[Tooru Fujisawa [:arai]]

it hits DOM exception at that line.

> SecurityError: The operation is insecure.

at |if (d = e[f].cssRules || e[f].rules) {| line in the following function, that is prettified code of http://contrejour.ie/scripts/cj.js?v=1.6.3

>   function z(a, b, c) {
>     for (var d, e = document.styleSheets, f = 0; f < e.length; f++) {
>       if (d = e[f].cssRules || e[f].rules) {
>         for (var g = 0; g < d.length; g++)
>           if (d[g].selectorText === a)
>             d[g].style[b] = c;
>       }
>     }
>   }

Comment 4

[Xidorn Quan [:xidorn] UTC+11]

Oh, hmmm, I didn't notice the security error. Then it is probably the same issue as bug 1304733 where we throw an error for cross-origin access (which matches the spec) but other browsers don't.

Comment 5

[Xidorn Quan [:xidorn] UTC+11]

(It's weird that there is no error shown in console... And I don't see try block there either.)

Comment 6

[Tooru Fujisawa [:arai]]

if I comment out the content of the "z" function above, I can play game.

Comment 7

[Mike Taylor [:miketaylr]]

This appears to be a site promoting MS Edge. Greg, would it be possible to get this fixed, or file an internal bug somewhere? The site relies on a CSSOM cross-origin violation (being able to write rule to a non-same origin stylesheet).

Comment 8

[Greg Whitworth]

Sent an email to people to try and find out who owns that site. I'll keep you posted on what I find out.

Comment 9

[Mike Taylor [:miketaylr]]

Thanks Greg!

Comment 10

[Sylvestre Ledru [:Sylvestre]]

Moving to p3 because no activity for at least 1 year(s).
See https://github.com/mozilla/bug-handling/blob/master/policy/triage-bugzilla.md#how-do-you-triage for more information

Comment 11

[Firefox Bug Husbandry Bot]

Migrating Webcompat whiteboard priorities to project flags. See bug 1547409.

Comment 12

[Firefox Bug Husbandry Bot]

See bug 1547409. Migrating whiteboard priority tags to program flags.

Comment 13

[Mike Taylor [:miketaylr]]

This loads now in Nightly (but not 67), so presumably we've done something to un-break this.