Created attachment 8824517 [details]
User Agent: Mozilla/5.0 (Windows NT 6.2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36
Steps to reproduce:
1. Start Firefox.
2. Visit the following webpage (https://www.ibiblio.org/e-notes/Perc/contents.htm), select each demo and interract with them.
3.5. Visit the following demo (https://www.ibiblio.org/e-notes/webgl/gpu/bounce.htm) and interract with it.
Error message:-Experimental WebGL_2 based applications work only in Chrome 49 and Firefox 45 yet!
1. Firefox successfully starts.
2. Each demo is displayed as it should and the animations plays as expected with no visible lags or visual glitches.
3. The demo is displayed as it should and no visible lags or glitches are seen.
User Agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:53.0) Gecko/20100101 Firefox/53.0
Thanks for reporting this. Can you please load the same demo in Chrome Canary? Just to eliminate any Hardware limitations that you might have.
I have tried to reproduce this issue on latest Nightly (Build ID: 20170110075905) and latest Beta v51.0b13 but couldn't. Can you provide more details regarding your graphic card ?
Can you please retest this using latest Firefox Beta (https://goo.gl/XmzCrj) and latest Nightly build (https://nightly.mozilla.org/) and report back the results ? When doing this, please use a new clean Firefox profile, maybe even safe mode, to eliminate custom settings as a possible cause (https://goo.gl/PNe90E).
User Agent Mozilla/5.0 (X11; Linux x86_64; rv:51.0) Gecko/20100101 Firefox/51.0
I was also unable to reproduce this bug.