Well I'd go with chrome for your testing for now. The computer I'm on right now has a very old graphics card so webgl shaders don't work at all. It only support opengl 1.4 and I think you need support for at least opengl 2.0 to get shaders working in the editor.
It is probably falling back to canvas2d in firefox. You could try setting "webgl.prefer-native-gl" to true and see if that works. I imagine it will if the effects are working in the editor.
All effects look as they should in the editor. Tried setting "webgl.prefer-native-gl" still no luck. I have a Nvidia GeForce 8800 graphics card and drivers are up to date. Is this hapenning to anyone else?
Create a text object and add an event "start of layout: set text to renderer" and see if it says webgl. If it says canvas2d can you run any other webgl shader demos from around the internet from firefox?
From my quick tests, most webGL fx works in firefox except water. The image distorts in the editor, it does distort too in chrome, but it doesn't when I preview in FF 14.0.1
Apart from this fx though, the others I've been trying are working.
Edit: I've just tested a combination Glass+GrayScale, and it happens to be flipping the over cog and under texture in the "WebGL shader effects.capx". Not really something I would have expected. But it does in FF and chrome (in the editor, it only flips the under texture).Kyatric2012-08-22 22:24:36