I was wondering if WebGL is considered stable enough to be enabled by default. It makes some PDFs render much faster and it has been off by default for a while now, so we have had quite some time to test it.

If we decide to enable WebGL by default, we should not forget to update https://github.com/mozilla/pdf.js/blob/master/extensions/chromium/preferences_schema.json#L39 as well.

/cc @yurydelendik 
/cc @Snuffleupagus (because IIRC you were testing WebGL too)

if (!this.contentVisible) {
        return;
      }
      this.save();
      const currentCtx = this.ctx;
      
      
      
      
      
      
      
      
      
      
      
      
      
      if (!group.isolated) {
        info("TODO: Support non-isolated groups.");
      }
      
      
      if (group.knockout) {
        warn("Knockout groups not supported.");
      }