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I’ve read these threads
Poor performance of html5 canvas under firefox
and
HTML 5 performance on Firefox?
but they’re over a year old.
I’m actively promoting use of the Canvas object in our studio, but need to suggest workarounds and performance tips for use in Firefox.
Can anyone offer their thoughts?
I think a lot has been happening/changing in one year regarding browser technologies.
So I don’t think that there are big performance issues regarding canvas and firefox.
There are several things to consider:
Recent browser versions support hardware accelerated 2D canvas.
You might have to enable them manually (check about:flags).
You can test performance with these benchmarks:
Also check out the html5rocks article about canvas performance pitfalls.
Finally you can use some canvas libraries (i.e. kineticjs) that use multiple (hidden) layers to improve performance.