Having a lot of performance issues (low frame rate) on the Web GL Browser games.  Am I missing some quick fix here or are the issues game side?  Escape the Ether and Disco Tomb are 2 games that are running poorly for me. Other's aren't.

I suggest that you try playing the Downloaded version on every game that you can, usually the WEBGL versions will perform poorly unless they were specifically optimized for it. (some people just add it to give users another chance to try out the game, but the downloaded version will always perform better.)

For example Disco Tomb also has a downloadable version.

Usually WebGL builds generated by game engines like Unity can't be optimized as much as those written natively in HTML5. Let me know if you experience similar issues with my entry, RetroFab, which was written in HTML5 and should perform better. 

One quick fix might be to check that your GPU is enabled for your browser in the 3D settings of your graphic card's control panel.