pouët.net

https://www.mozilla.org/de/firefox/developer/

Firefox now features a GLSL Editor, feels pretty nice from just looking for 5 minutes into it.

Just go to dev-tools then activate shader editor.

And have fun :)

I didn't take a look at it yet, but have they fixed the compile times for shaders in firefox?

Uuuh, all of these features are currently available in the normal mainline Firefox - does that mean they're removing them? :/

Apparently not, they're just renaming their Aurora channel to "Developer Edition".