WebGL 2.0 Problem with canvas

Hello i have a problem in webgl 2.0 build. When its resolution basic 600 * 960 everything is good… but when i switch fullscreen its bad… i added picture to see… When i change canvas for example to 768 * 1024 everything bigger than 600*960 looks bad…
Webgl 1.0 works good but new chrome and firefox have default webgl 2.0. Do you know about this error?

2941660--217713--Screenshot_10.png

could you please submit a bug report with a repro project and post the bug number here?

Problem was in FXpro tool … i thought its webgl 2.0 problem.