Big HTML5 project breaks latest Firefox/Firebug

Link to .capx file (required!): Performance Issue in a big C2 project in latest firefox. Sorry there is no .capx file available due to company terms

http://

Steps to reproduce:

1. Create a big C2 project and export it as HTML5

2. Serve it on a webserver

3. (if there is only one image file missing on the server, HTML5 game hangs on startup and displays some corrupted image fragments in the canvas area; error messages are displayed)

4. if all images are available on the server, but firebug plugin is active, we observe the same effect, but unfortunately without error messages

Observed result:

• Firefox hangs and stalls in an endless JS loop

Expected result:

• Latest Firefox in combination with latest Firebug Plugin should work, since we use Firebug for debugging

• If image files are missing on the server, at least start screen should be displayed and basic error handling possible

(please note: everything works okay in previous Firefox versions)

Browsers affected:

Firefox: yes, Version 21.0, Latest Firebug plugin

Chrome: no

Internet Explorer: no

Construct 2 version: 126

(Even if there is no solution to this problem at this point it would be very helpful to me if someone has encountered a similar issue?)

I've seen, if all layers have Background set to transparent, that many sprites appear overlapped at 0,0.

We can't even investigate issues, let alone fix them, unless you provide your project.

In this case I think it just might be the offline cache playing up. If you re-upload your game to a new URL with all the images present, does it work? The offline cache might have cached the fact a file was missing (it can be pretty stubborn).

Try to upload again and restart the game. Sometimes it happens.