Empty Heatmap in FF 12 or 13

[carver]

Reproduction steps:

• In Windows 7, open Firefox 13
• go to http://www.patrick-wied.at/static/heatmapjs
• click "Display website's realtime heatmap"
• no heatmap displayed

The same demo heatmap displays correctly in Chrome and IE.

[pa7]

Did you see an error message in the console? If yes, please tell me about it

[carver]

Just this 404: https://a248.e.akamai.net/assets.github.com/img/bec6c51521dcc8148146135149fe06a9cc737577/687474703a2f2f73332e616d617a6f6e6177732e636f6d2f6769746875622f726962626f6e732f666f726b6d655f6c6566745f6461726b626c75655f3132313632312e706e67

No javascript logs. This canvas gets added, but no visualization:
<canvas width="1020" height="1160" style="position: absolute; top: 0px; left: 0px; z-index: 1000000; display: block;"></canvas>

I confirmed that another canvas demo shows up on the same browser, here: http://spielzeugz.de/html5/liquid-particles.html

[jrgns]

We had the same issue, but got it working by using the heatmap.js in the src folder, not the one found in the root.

To add to the confusion, we only had the issue on certain computers. Couldn't figure out what the difference between the installs were. Checked the versions, add ons, plugins, OS's.

@pa7 Which is the correct file? Why do they differ?

[pa7]

The one in the src folder is the correct file, I will remove the file from the root folder so there's no confusion anymore.