“Try installing Firefox?” But I’m using Firefox!

Are you trying to launch a sim in Firefox, and are presented with the following message?

This means Firefox needs a tune up! Follow the instructions below to successfully run the sim in Firefox.

Step 1: Type about:support into your Firefox URL bar

Step 2: Go to graphics section. Check for WebGL related graphics errors.

Ex: Has WebGL been disabled due to a previous crash?

Step 3: Give Firefox a tuneup

Refresh Firefox by clicking button in top right corner under "Give Firefox a tuneup"

Step 4: Open a fresh browser window and launch simulation