[melling]

<rant> Firefox 3.6 is dead. People should stop supporting it. Market share is around 3% and it officially becomes unsupported in April. If you don't like the new Firefox use a different browser. </rant>

Sorry about that, but people can either support legacy browsers or add new features, and too much time has already been wasted.

[niklasvh]

There is no additional code in the script which is there to just support FF down to 3.6, the reason the script isn't supported on older FF versions is due to lack of key methods missing/or partial support (i.e. getBoundingClientRect, canvas etc.). Nor is there any functionality in the script that the support for FF 3.6 is holding back.